drm: Handle io prot correctly for MIPS.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Hongliang Tao <taohl@lemote.com>
Signed-off-by: Hua Yan <yanh@lemote.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index f8187ea..0df71ea 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -472,7 +472,7 @@
 	else
 		tmp = pgprot_noncached(tmp);
 #endif
-#if defined(__sparc__)
+#if defined(__sparc__) || defined(__mips__)
 	if (!(caching_flags & TTM_PL_FLAG_CACHED))
 		tmp = pgprot_noncached(tmp);
 #endif