drm/amd/powerplay: re-enable FW_DSTATE feature bit

SMU firmware has fix the bug, so remove this workaround.
Signed-off-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/navi10_ppt.c

@@ -372,11 +372,8 @@ navi10_get_allowed_feature_mask(struct smu_context *smu,
 	if (adev->pm.pp_feature & PP_SCLK_DEEP_SLEEP_MASK)
 		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_DS_GFXCLK_BIT);
 
-	if (adev->pm.pp_feature & PP_GFXOFF_MASK) {
+	if (adev->pm.pp_feature & PP_GFXOFF_MASK)
 		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_GFXOFF_BIT);
-		/* TODO: remove it once fw fix the bug */
-		*(uint64_t *)feature_mask &= ~FEATURE_MASK(FEATURE_FW_DSTATE_BIT);
-	}
 
 	if (smu->adev->pg_flags & AMD_PG_SUPPORT_MMHUB)
 		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_MMHUB_PG_BIT);