drm/amd/pm: enable ACDC feature

The power limit and clock ragne are different in AC mode and DC mode.
Firmware does the setting after this feature is enabled.
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c

@@ -294,6 +294,9 @@ sienna_cichlid_get_allowed_feature_mask(struct smu_context *smu,
 	    smu->adev->pg_flags & AMD_PG_SUPPORT_JPEG)
 		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_MM_DPM_PG_BIT);
 
+	if (smu->dc_controlled_by_gpio)
+       *(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_ACDC_BIT);
+
 	return 0;
 }