drm/amd/powerplay: hold on the arcturus gfx dpm support in driver

As for now, only "Prefetcher" is guarded to be working from
SMU firmware.
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/powerplay/arcturus_ppt.c

@@ -324,8 +324,7 @@ arcturus_get_allowed_feature_mask(struct smu_context *smu,
 
 	memset(feature_mask, 0, sizeof(uint32_t) * num);
 
-	*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_DPM_PREFETCHER_BIT)
-				| FEATURE_MASK(FEATURE_DPM_GFXCLK_BIT);
+	*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_DPM_PREFETCHER_BIT);
 
 	return 0;
 }