drm/amdgpu: add new CG flag for ROM clockgating

Acked-by: Tom St Denis <tom.stdenis@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h
index 04e40906..f8afe53 100644
--- a/drivers/gpu/drm/amd/include/amd_shared.h
+++ b/drivers/gpu/drm/amd/include/amd_shared.h
@@ -104,6 +104,7 @@
 #define AMD_CG_SUPPORT_VCE_MGCG			(1 << 14)
 #define AMD_CG_SUPPORT_HDP_LS			(1 << 15)
 #define AMD_CG_SUPPORT_HDP_MGCG			(1 << 16)
+#define AMD_CG_SUPPORT_ROM_MGCG			(1 << 17)
 
 /* PG flags */
 #define AMD_PG_SUPPORT_GFX_PG			(1 << 0)