sh_eth: Fix memleak in sh_mdio_release

Allocated memory for IRQs should be freed when releasing the mii_bus

Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org>
Acked-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c
index 586ed09..501a55f 100644
--- a/drivers/net/sh_eth.c
+++ b/drivers/net/sh_eth.c
@@ -1294,6 +1294,9 @@
 	/* remove mdio bus info from net_device */
 	dev_set_drvdata(&ndev->dev, NULL);
 
+	/* free interrupts memory */
+	kfree(bus->irq);
+
 	/* free bitbang info */
 	free_mdio_bitbang(bus);