drm: Use DRM_ROTATE_MASK and DRM_REFLECT_MASK

Avoid magic numbers and use the introduced defines.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/drm_rect.c b/drivers/gpu/drm/drm_rect.c
index 631f5af..531ac4c 100644
--- a/drivers/gpu/drm/drm_rect.c
+++ b/drivers/gpu/drm/drm_rect.c
@@ -330,7 +330,7 @@
 		}
 	}
 
-	switch (rotation & 0xf) {
+	switch (rotation & DRM_ROTATE_MASK) {
 	case BIT(DRM_ROTATE_0):
 		break;
 	case BIT(DRM_ROTATE_90):
@@ -390,7 +390,7 @@
 {
 	struct drm_rect tmp;
 
-	switch (rotation & 0xf) {
+	switch (rotation & DRM_ROTATE_MASK) {
 	case BIT(DRM_ROTATE_0):
 		break;
 	case BIT(DRM_ROTATE_90):