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,
f='/guix/tree/gnu/build/linux-modules.scm?id=5184da4f7f1443e1ed99a1b8eabd47321559b810'>tree</a><a href='/guix/commit/gnu/build/linux-modules.scm?id=5184da4f7f1443e1ed99a1b8eabd47321559b810'>commit</a><a href='/guix/diff/gnu/build/linux-modules.scm?id=5184da4f7f1443e1ed99a1b8eabd47321559b810'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/build/linux-modules.scm'>
<input type='hidden' name='id' value='5184da4f7f1443e1ed99a1b8eabd47321559b810'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=5184da4f7f1443e1ed99a1b8eabd47321559b810'>root</a>/<a href='/guix/log/gnu?id=5184da4f7f1443e1ed99a1b8eabd47321559b810'>gnu</a>/<a href='/guix/log/gnu/build?id=5184da4f7f1443e1ed99a1b8eabd47321559b810'>build</a>/<a href='/guix/log/gnu/build/linux-modules.scm?id=5184da4f7f1443e1ed99a1b8eabd47321559b810'>linux-modules.scm</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/build/linux-modules.scm?id=5184da4f7f1443e1ed99a1b8eabd47321559b810&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-05-29 22:01:23 -0400'>2024-05-29</span></td><td><a href='/guix/commit/gnu/build/linux-modules.scm?id=afacfa33ec4b52cb9ffb9b0a7a0c1e68cf264673'>gnu: linux-libre: Enable Zstd compression of kernel modules.</a><span class='msg-avail'>...<span class='msg-tooltip'>This brings the on disk size of the kernel from 164 MiB to 144 MiB, or about
12%.

* gnu/packages/linux.scm (default-extra-linux-options)
[version&gt;=5.13]: Enable CONFIG_MODULE_COMPRESS_ZSTD, else
CONFIG_MODULE_COMPRESS_GZIP.
(make-linux-libre*) [phases] {set-environment}: Set ZSTD_CLEVEL environment
variable to 19.
[native-inputs]: Add zstd.
* gnu/build/linux-modules.scm (module-regex): Add .zst to regexp.  Update doc.
(modinfo-section-contents): Extend support to Zstd compressed module.
(dot-ko): Register the 'zstd compression type.
(ensure-dot-ko, file-name-&gt;module-name, load-linux-module*)
(module-name-&gt;file-name/guess, write-module-name-database)
(write-module-alias-database, write-module-device-database): Update doc.
(module-name-lookup): Also consider zstd-compressed modules.
* gnu/installer.scm (installer-program): Add guile-zstd extension to gexp.
* gnu/system/linux-initrd.scm (flat-linux-module-directory): Likewise.
Decompress zstd-compressed modules for use in initrd.
* guix/profiles.scm (linux-module-database): Add guile-zstd extension to gexp.

Change-Id: Ide899dc5c58ea5033583b1a91a92c025fc8d901a
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-27 22:23:38 +0800'>2024-03-27</span></td><td><a href='/guix/commit/gnu/build/linux-modules.scm?id=7995816ec4c38e447a2dcbeb33243180709e177d'>linux-modules: Ignore nonexistent module files on boot.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a follow-up to 8f8ec56052766aa5105d672b77ad9eaca5c1ab3c, which only
covers building initrd, while the booting code still tries to load nonexistent
files for builtin modules.

* gnu/build/linux-modules.scm (load-linux-modules-from-directory): Ignore
nonexistent module files.

Change-Id: I09ef207e82397e915e671c8464b92bcf90f03dcf
</span></span></td><td>Hilton Chain</td></tr>
<tr><td><span title='2023-10-15 02:00:00 +0200'>2023-10-15</span></td><td><a href='/guix/commit/gnu/build/linux-modules.scm?id=47e265af75141f6ffb557cf6c41a02a05ec82ccb'>linux-modules: Fix module dependency loading.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/linux-modules.scm (dot-ko): Make COMPRESSION optional,
as expected by callers RECURSIVE-MODULE-DEPENDENCIES and
LOAD-LINUX-MODULE*.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>