modesetting: Don't call into RandR if xinerama is enabled.

RandR doesn't initialize alongside Xinerama.
This fixes a segfault with tearing down the modesetting driver
while xinerama is in use.

Signed-off-by: stefan11111 <stefan11111github@gmail.com>

hw/xfree86/drivers/video/modesetting/drmmode_display.c

@@ -41,6 +41,7 @@
 #include "os/mathx_priv.h"
 #include "Xext/present/present_priv.h"
 
+#include "extinit.h"
 #include "inputstr.h"
 #include "xf86str.h"
 #include "X11/Xatom.h"
@@ -4605,7 +4606,12 @@ out_free_res:
 
     drmModeFreeResources(mode_res);
 out:
+#ifdef XINERAMA
+    if (noPanoramiXExtension)
+#endif
+    {
         RRGetInfo(xf86ScrnToScreen(scrn), TRUE);
+    }
 }
 
 #undef DRM_MODE_LINK_STATUS_BAD