net: phy: mdio-bcm-unimac: NULL-terminate unimac_mdio_ids

drivers/net/phy/mdio-bcm-unimac.c:195:37-38: unimac_mdio_ids is not NULL
terminated at line 195

Make sure of_device_id tables are NULL terminated
Generated by: scripts/coccinelle/misc/of_table.cocci
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/phy/mdio-bcm-unimac.c

@@ -193,6 +193,7 @@ static struct of_device_id unimac_mdio_ids[] = {
 	{ .compatible = "brcm,genet-mdio-v2", },
 	{ .compatible = "brcm,genet-mdio-v1", },
 	{ .compatible = "brcm,unimac-mdio", },
+	{ /* sentinel */ },
 };
 
 static struct platform_driver unimac_mdio_driver = {