drm/amdgpu/vcn: enable vcn DPG mode for VCN4_0_3

Enable vcn DPG mode for VCN4_0_3.
Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1100,6 +1100,7 @@ static int soc15_common_early_init(void *handle)
 			AMD_CG_SUPPORT_JPEG_MGCG;
 		adev->pg_flags =
 			AMD_PG_SUPPORT_VCN |
+			AMD_PG_SUPPORT_VCN_DPG |
 			AMD_PG_SUPPORT_JPEG;
 		break;
 	default: