drm/amd/powerplay: regards the APU always enable the dpm feature mask

There is no driver message to enable/disable feature mask for APU.
For the sake of APU reusing swSMU interface and assume APU supports all
the feature.
Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Aaron Liu <aaron.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/amdgpu_smu.c

@@ -636,7 +636,7 @@ int smu_feature_is_enabled(struct smu_context *smu, enum smu_feature_mask mask)
 	int ret = 0;
 
 	if (adev->flags & AMD_IS_APU)
-		return 0;
+		return 1;
 
 	feature_id = smu_feature_get_index(smu, mask);
 	if (feature_id < 0)