drm/amdgpu: set vcn mgcg flag for picasso

enable vcn mgcg flag for picasso.
Signed-off-by: Sathishkumar S <sathishkumar.sundararaju@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/soc15.c

@@ -1401,7 +1401,8 @@ static int soc15_common_early_init(void *handle)
 				AMD_CG_SUPPORT_MC_MGCG |
 				AMD_CG_SUPPORT_MC_LS |
 				AMD_CG_SUPPORT_SDMA_MGCG |
-				AMD_CG_SUPPORT_SDMA_LS;
+				AMD_CG_SUPPORT_SDMA_LS |
+				AMD_CG_SUPPORT_VCN_MGCG;
 
 			adev->pg_flags = AMD_PG_SUPPORT_SDMA |
 				AMD_PG_SUPPORT_MMHUB |