drm/amdgpu: optimize list operation in amdgpu_xgmi

simplify the list operation.
Signed-off-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -324,7 +324,7 @@ static void amdgpu_xgmi_sysfs_rem_dev_info(struct amdgpu_device *adev,
 
 struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev)
 {
-	struct amdgpu_hive_info *hive = NULL, *tmp = NULL;
+	struct amdgpu_hive_info *hive = NULL;
 	int ret;
 
 	if (!adev->gmc.xgmi.hive_id)
@@ -337,12 +337,10 @@ struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev)
 
 	mutex_lock(&xgmi_mutex);
 
-	if (!list_empty(&xgmi_hive_list)) {
-		list_for_each_entry_safe(hive, tmp, &xgmi_hive_list, node)  {
+	list_for_each_entry(hive, &xgmi_hive_list, node)  {
 		if (hive->hive_id == adev->gmc.xgmi.hive_id)
 			goto pro_end;
 	}
-	}
 
 	hive = kzalloc(sizeof(*hive), GFP_KERNEL);
 	if (!hive) {