Revert "net: hns3: add void before function which don't receive ret"

This reverts commit 5ac4f180.

Sorry for taking no notice that the function devlink_register() has been
already declared as void, so it is needs to revert this patch.
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Link: https://lore.kernel.org/r/20211204012448.51360-1-huangguangbin2@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c

@@ -120,7 +120,7 @@ int hclge_devlink_init(struct hclge_dev *hdev)
 	hdev->devlink = devlink;
 
 	devlink_set_features(devlink, DEVLINK_F_RELOAD);
-	(void)devlink_register(devlink);
+	devlink_register(devlink);
 	return 0;
 }
 

drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_devlink.c

@@ -122,7 +122,7 @@ int hclgevf_devlink_init(struct hclgevf_dev *hdev)
 	hdev->devlink = devlink;
 
 	devlink_set_features(devlink, DEVLINK_F_RELOAD);
-	(void)devlink_register(devlink);
+	devlink_register(devlink);
 	return 0;
 }