Removes references to mibstore.h and miInitializeBackingStore, which
have been removed from xorg-server.  Zack Rusin <zackr@vmware.com>
wrote: "It was a noop for at least 5 years and it has been removed."
See: http://patches.openembedded.org/patch/46133/

--- xf86-video-tga-1.2.2/src/tga_accel.c.~1~	2012-07-15 23:54:04.000000000 -0400
+++ xf86-video-tga-1.2.2/src/tga_accel.c	2014-12-19 01:40:27.535913013 -0500
@@ -37,7 +37,6 @@
 #include "xf86cmap.h"
 #include "mipointer.h"
 
-#include "mibstore.h"
 #include "miline.h"
 
 #include "tga_regs.h"
--- xf86-video-tga-1.2.2/src/tga_driver.c.~1~	2012-07-15 23:54:28.000000000 -0400
+++ xf86-video-tga-1.2.2/src/tga_driver.c	2014-12-19 01:40:48.756018238 -0500
@@ -46,8 +46,6 @@
 
 /* software cursor */
 #include "mipointer.h"
-/* backing store */
-#include "mibstore.h"
 
 /*  #include "mibank.h" */
 /* colormap manipulation */
@@ -1451,7 +1449,6 @@
     
     fbPictureInit (pScreen, 0, 0);
     
-    miInitializeBackingStore(pScreen);
     xf86SetBackingStore(pScreen);
     xf86SetSilkenMouse(pScreen);
 
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<tr><td><span title='2018-08-29 23:32:01 +0200'>2018-08-29</span></td><td><a href='/guix/commit/gnu/tests.scm?id=d258c791441b46705f4360cf141343363d1751f2'>tests: Warn about test module load failures.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-05-28 13:24:19 +0200'>2018-05-28</span></td><td><a href='/guix/commit/gnu/tests.scm?id=9ceeca0880248eee8c2796f5e6ebc172b95277f7'>system: Remove uses of the 'title' field of &lt;file-system&gt;.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-02-19 22:04:11 +0100'>2018-02-19</span></td><td><a href='/guix/commit/gnu/tests.scm?id=27a2c9c3e071fdb380c2f4f389b7cf4008dc75f7'>marionette: Use QEMU's "VM channel" mechanism.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-09 20:02:26 +0100'>2018-01-09</span></td><td><a href='/guix/commit/gnu/tests.scm?id=16d78a8f7207271e662d9152150b0cf790492373'>tests: marionette-operating-system: Add initrd parameter and kernel-arguments.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2017-12-06 15:02:24 +0100'>2017-12-06</span></td><td><a href='/guix/commit/gnu/tests.scm?id=fdfdecdb7ebfd05b4ae66cc5140078dbfc10fc35'>gnu, doc, tests: Use ‘bootloader-configuration’ everywhere.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-08-23 22:23:19 +0200'>2017-08-23</span></td><td><a href='/guix/commit/gnu/tests.scm?id=045ebb3e58d74c75f39ce47380045d3cd00359c3'>gnu: bootloader: Deprecate "device" field in favor of "target".</a><span class='msg-avail'>...</span></td><td>Andy Wingo</td></tr>
<tr><td><span title='2017-05-16 14:41:01 +0200'>2017-05-16</span></td><td><a href='/guix/commit/gnu/tests.scm?id=b09a8da4a2e50845a297e041762f3ff9e649c047'>bootloader: Add extlinux support.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>