compositor: Do not prefer Xpresent for AMD/Radeon

There is a bug in the amdgpu DDX which causes an image corruption when
Xpresent is used.

We should not prefer Xpresent for those, as people upgrading from 4.14
would possibly see this as a regression.
Signed-off-by: Olivier Fourdan <fourdan@xfce.org>
Closes: #490
See-also: https://gitlab.freedesktop.org/xorg/driver/xf86-video-amdgpu/-/issues/10

src/compositor.c

@@ -1117,7 +1117,12 @@ check_glx_renderer (ScreenInfo *screen_info)
 #if HAVE_PRESENT_EXTENSION
     const char *prefer_xpresent[] = {
         "Intel",
-        "AMD",
+        /* Cannot add AMD and Radeon until the fix for
+         * https://gitlab.freedesktop.org/xorg/driver/xf86-video-amdgpu/-/issues/10
+         * is included in a release.
+         */
+        /* "AMD", */
+        /* "Radeon", */
         NULL
     };
 #endif /* HAVE_PRESENT_EXTENSION */