drm: Remove mtrr_add and mtrr_del fallback hack for non-MTRR systems

There are no users left in drivers/gpu.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 5a876555..b06f5af 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -55,16 +55,13 @@
 #include <linux/mm.h>
 #include <linux/cdev.h>
 #include <linux/mutex.h>
+#include <linux/io.h>
 #include <linux/slab.h>
 #if defined(__alpha__) || defined(__powerpc__)
 #include <asm/pgtable.h>	/* For pte_wrprotect */
 #endif
-#include <asm/io.h>
 #include <asm/mman.h>
 #include <asm/uaccess.h>
-#ifdef CONFIG_MTRR
-#include <asm/mtrr.h>
-#endif
 #if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
 #include <linux/types.h>
 #include <linux/agp_backend.h>