sh_eth: replace devm_kzalloc() with devm_kmalloc_array()

When I was converting the driver to the managed device API, only devm_kzalloc()
was available for memory allocation, so I had to use it, despite zeroing out the
PHY IRQ array right before initializing all  its entries to PHY_POLL was quite
stupid.   Now that devm_kmalloc_array() has become available, we can avoid the
needless zeroing out...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/renesas/sh_eth.c

@@ -2627,7 +2627,7 @@ static int sh_mdio_init(struct sh_eth_private *mdp,
 		 pdev->name, pdev->id);
 
 	/* PHY IRQ */
-	mdp->mii_bus->irq = devm_kzalloc(dev, sizeof(int) * PHY_MAX_ADDR,
+	mdp->mii_bus->irq = devm_kmalloc_array(dev, PHY_MAX_ADDR, sizeof(int),
 					       GFP_KERNEL);
 	if (!mdp->mii_bus->irq) {
 		ret = -ENOMEM;