drm/amd/soc21: enable mmhub and athub power gating

add the pg_flag for athub and mmhub pg.
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Jack Gui <Jack.Gui@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -556,7 +556,9 @@ static int soc21_common_early_init(void *handle)
 		adev->pg_flags =
 			AMD_PG_SUPPORT_VCN |
 			AMD_PG_SUPPORT_VCN_DPG |
-			AMD_PG_SUPPORT_JPEG;
+			AMD_PG_SUPPORT_JPEG |
+			AMD_PG_SUPPORT_ATHUB |
+			AMD_PG_SUPPORT_MMHUB;
 		adev->external_rev_id = adev->rev_id + 0x10;
 		break;
 	default: