net: thunderx: Fix error return code in nicvf_open()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 712c3185 ("net: thunderx: Program LMAC credits based on MTU")
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/thunder/nicvf_main.c

@@ -1274,7 +1274,8 @@ int nicvf_open(struct net_device *netdev)
 	/* Configure receive side scaling and MTU */
 	if (!nic->sqs_mode) {
 		nicvf_rss_init(nic);
-		if (nicvf_update_hw_max_frs(nic, netdev->mtu))
+		err = nicvf_update_hw_max_frs(nic, netdev->mtu);
+		if (err)
 			goto cleanup;
 
 		/* Clear percpu stats */