staging: wilc1000: handle_set_mac_address: fix kmalloc return error code

This patch fix return error code of kmalloc as -ENOMEM instead of
-EFAULT.
Signed-off-by: NChaehyun Lim <chaehyun.lim@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/host_interface.c

@@ -432,7 +432,7 @@ static s32 handle_set_mac_address(struct wilc_vif *vif,
 	u8 *mac_buf = kmalloc(ETH_ALEN, GFP_KERNEL);
 
 	if (!mac_buf)
-		return -EFAULT;
+		return -ENOMEM;
 
 	memcpy(mac_buf, set_mac_addr->mac_addr, ETH_ALEN);