[PATCH net-next] net: ibm: fix return type of ndo_start_xmit function

[David Miller]

From: YueHaibing <yuehaibing at huawei.com>
Date: Tue, 18 Sep 2018 14:35:47 +0800

> The method ndo_start_xmit() is defined as returning an 'netdev_tx_t',
> which is a typedef for an enum type, so make sure the implementation in
> this driver has returns 'netdev_tx_t' value, and change the function
> return type to netdev_tx_t.
> 
> Found by coccinelle.
> 
> Signed-off-by: YueHaibing <yuehaibing at huawei.com>

Applied.