drm/amdgpu/soc21: enable ATHUB and MMHUB PG

Enable ATHUB and MMHUB powergating.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/soc21.c

@@ -476,7 +476,8 @@ static int soc21_common_early_init(void *handle)
 	switch (adev->ip_versions[GC_HWIP][0]) {
 	case IP_VERSION(11, 0, 0):
 		adev->cg_flags = 0;
-		adev->pg_flags = 0;
+		adev->pg_flags = AMD_PG_SUPPORT_ATHUB |
+			AMD_PG_SUPPORT_MMHUB;
 		adev->external_rev_id = adev->rev_id + 0x1; // TODO: need update
 		break;
 	default: