netx-eth: initialize per device spinlock

The spinlock used in the netx-eth driver was never properly initialized.
This was noticed using CONFIG_DEBUG_SPINLOCK=y

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/netx-eth.c

@@ -401,6 +401,8 @@ static int netx_eth_drv_probe(struct platform_device *pdev)
 	priv->xmac_base = priv->xc->xmac_base;
 	priv->sram_base = priv->xc->sram_base;
 
+	spin_lock_init(&priv->lock);
+
 	ret = pfifo_request(PFIFO_MASK(priv->id));
 	if (ret) {
 		printk("unable to request PFIFO\n");