iavf: fix double-release of rtnl_lock

This code does not jump to exit on an error in iavf_lan_add_device(),
so the rtnl_unlock() from the normal path will follow.

Fixes: b66c7bc1 ("iavf: Refactor init state machine")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/iavf/iavf_main.c

@@ -1834,12 +1834,10 @@ static int iavf_init_get_resources(struct iavf_adapter *adapter)
 	netif_tx_stop_all_queues(netdev);
 	if (CLIENT_ALLOWED(adapter)) {
 		err = iavf_lan_add_device(adapter);
-		if (err) {
-			rtnl_unlock();
+		if (err)
 			dev_info(&pdev->dev, "Failed to add VF to client API service list: %d\n",
 				 err);
 	}
-	}
 	dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
 	if (netdev->features & NETIF_F_GRO)
 		dev_info(&pdev->dev, "GRO is enabled\n");