Fix build against xorg-server >= 1.20.

Patch taken from upstream:
https://cgit.freedesktop.org/xorg/driver/xf86-video-savage/commit/?id=0ece556daa8a88771b669d8104396abd9166d2d0

diff --git a/src/savage_driver.c b/src/savage_driver.c
index 58a294d..3cda923 100644
--- a/src/savage_driver.c
+++ b/src/savage_driver.c
@@ -2034,8 +2034,6 @@ static Bool SavagePreInit(ScrnInfoPtr pScrn, int flags)
     xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "Detected current MCLK value of %1.3f MHz\n",
 	       mclk / 1000.0);
 
-    pScrn->maxHValue = 2048 << 3;	/* 11 bits of h_total 8-pixel units */
-    pScrn->maxVValue = 2048;		/* 11 bits of v_total */
     pScrn->virtualX = pScrn->display->virtualX;
     pScrn->virtualY = pScrn->display->virtualY;
 
@@ -3637,6 +3635,14 @@ static ModeStatus SavageValidMode(SCRN_ARG_TYPE arg, DisplayModePtr pMode,
        (pMode->VDisplay > psav->PanelY)))
 	    return MODE_PANEL;
 
+    /* 11 bits of h_total 8-pixel units */
+    if (pMode->HTotal > (2048 << 3))
+	return MODE_BAD_HVALUE;
+
+    /* 11 bits of v_total */
+    if (pMode->VTotal > 2048)
+	return MODE_BAD_VVALUE;
+
     if (psav->UseBIOS) {
 	refresh = SavageGetRefresh(pMode);
         return (SavageMatchBiosMode(pScrn,pMode->HDisplay,
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<div class='path'>path: <a href='/guix/log/?id=680674ba06ac209d44645cda122bcd50cc614e69'>root</a>/<a href='/guix/log/gnu?id=680674ba06ac209d44645cda122bcd50cc614e69'>gnu</a>/<a href='/guix/log/gnu/system?id=680674ba06ac209d44645cda122bcd50cc614e69'>system</a>/<a href='/guix/log/gnu/system/examples?id=680674ba06ac209d44645cda122bcd50cc614e69'>examples</a>/<a href='/guix/log/gnu/system/examples/beaglebone-black.tmpl?id=680674ba06ac209d44645cda122bcd50cc614e69'>beaglebone-black.tmpl</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/system/examples/beaglebone-black.tmpl?id=680674ba06ac209d44645cda122bcd50cc614e69&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-03-03 17:55:32 +0100'>2023-03-03</span></td><td><a href='/guix/commit/gnu/system/examples/beaglebone-black.tmpl?id=4892c0186eec75253701c5097803b6168a2956ce'>services: base: Deprecate 'agetty-service' procedure.</a><span class='msg-avail'>...</span></td><td>Bruno Victal</td></tr>
<tr><td><span title='2022-12-16 23:42:17 -0500'>2022-12-16</span></td><td><a href='/guix/commit/gnu/system/examples/beaglebone-black.tmpl?id=491bddfa276cc9775adf325c07e5f82638f330e7'>system: examples: Add mode prop line.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
></td><td><a href='/guix/commit/gnu/packages/ccache.scm?id=56f33f3fd58ab5ad181aefd9cce2c72d06767803'>gnu: ccache: Upgrade to 3.3.1.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2016-09-22 23:43:20 -0500'>2016-09-22</span></td><td><a href='/guix/commit/gnu/packages/ccache.scm?id=bd368c71749f09af69f5f5688cf536f0e943b868'>gnu: ccache: Use modify-phases.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2016-07-10 06:48:27 +0300'>2016-07-10</span></td><td><a href='/guix/commit/gnu/packages/ccache.scm?id=9d5448f35f8d933c7dd54427bf6b3186a5154919'>gnu: ccache: Update to 3.2.5.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2016-02-01 15:01:20 -0600'>2016-02-01</span></td><td><a href='/guix/commit/gnu/packages/ccache.scm?id=6009df63915b55bad3e4ebbf09f90904feb2c3ac'>gnu: ccache: Update to 3.2.4.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2015-07-14 18:14:43 -0500'>2015-07-14</span></td><td><a href='/guix/commit/gnu/packages/ccache.scm?id=107db20da89e7d4dba73d7eaf7f2fe41b963a98b'>gnu: ccache: Update to 3.2.2.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2014-10-20 16:49:32 -0500'>2014-10-20</span></td><td><a href='/guix/commit/gnu/packages/ccache.scm?id=1454a2ba88fc0696192e520e2cbd27b380e4d8f2'>gnu: ccache: Upgrade to 3.1.10.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2014-05-20 16:21:43 -0500'>2014-05-20</span></td><td><a href='/guix/commit/gnu/packages/ccache.scm?id=5bbd6bf1815398f3cbe3d2f218b537a82f7219a7'>gnu: Add ccache.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
53ea46d880e9a7'>snippets: tempel: Fix calls to mapconcat.</a><span class='msg-avail'>...</span></td><td>Liliana Marie Prikler</td></tr>
<tr><td><span title='2022-09-26 23:29:36 +0200'>2022-09-26</span></td><td><a href='/guix/commit/etc/snippets?id=b6274a20e8e99fa6287264289da42ed364fc976c'>etc: Add tempel snippet move.</a><span class='msg-avail'>...</span></td><td>Nicolas Graves</td></tr>
<tr><td><span title='2022-08-30 11:50:15 +0200'>2022-08-30</span></td><td><a href='/guix/commit/etc/snippets?id=47c11772dfe840a536ed7ec438fe832878f51054'>etc: Update yasnippet build system list.</a><span class='msg-avail'>...</span></td><td>Nicolas Graves</td></tr>
<tr><td><span title='2022-08-30 11:50:15 +0200'>2022-08-30</span></td><td><a href='/guix/commit/etc/snippets?id=0928b82070d495a413a1df873cfc817b673cd4d1'>etc: Add tempel snippet for :phases.</a><span class='msg-avail'>...</span></td><td>Nicolas Graves</td></tr>
<tr><td><span title='2022-08-30 11:50:14 +0200'>2022-08-30</span></td><td><a href='/guix/commit/etc/snippets?id=c4acaf412064568a546034871a9e0d3888aa7937'>etc: Add tempel snippets.</a><span class='msg-avail'>...</span></td><td>Nicolas Graves</td></tr>