drm/amdgpu/nv: set vcn pg flag

Enable VCN power gating by default.
Signed-off-by: NJack Xiao <Jack.Xiao@amd.com>
Reviewed-by: NHuang Rui <ray.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -505,7 +505,7 @@ static int nv_common_early_init(void *handle)
 			AMD_CG_SUPPORT_VCN_MGCG |
 			AMD_CG_SUPPORT_BIF_MGCG |
 			AMD_CG_SUPPORT_BIF_LS;
-		adev->pg_flags = 0;
+		adev->pg_flags = AMD_PG_SUPPORT_VCN;
 		adev->external_rev_id = adev->rev_id + 0x1;
 		break;
 	default: