sdm: Do not use driver enums for flips

Driver enums for flips may be removed, use internal ones.

Change-Id: If8576ab3fc9a9f705480265b59ef3e05a1a51018
CRs-fixed: 1114808
diff --git a/libdrmutils/drm_interface.h b/libdrmutils/drm_interface.h
index 8c97215..4c37e8c 100644
--- a/libdrmutils/drm_interface.h
+++ b/libdrmutils/drm_interface.h
@@ -174,6 +174,12 @@
   CONNECTOR_SET_OUTPUT_FB_ID,
 };
 
+enum struct DRMRotation {
+  FLIP_H = 0x1,
+  FLIP_V = 0x2,
+  ROT_90 = 0x4,
+};
+
 enum struct DRMBlendType {
   UNDEFINED = 0,
   OPAQUE = 1,