staging: wilc1000: handle_set_mac_address: use kmemdup

This patch replaces kmalloc followed by memcpy with kmemdup.
Signed-off-by: Chaehyun Lim <chaehyun.lim@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/host_interface.c

@@ -429,13 +429,11 @@ static s32 handle_set_mac_address(struct wilc_vif *vif,
 {
 	s32 result = 0;
 	struct wid wid;
-	u8 *mac_buf = kmalloc(ETH_ALEN, GFP_KERNEL);
 
+	u8 *mac_buf = kmemdup(set_mac_addr->mac_addr, ETH_ALEN, GFP_KERNEL);
 	if (!mac_buf)
 		return -ENOMEM;
 
-	memcpy(mac_buf, set_mac_addr->mac_addr, ETH_ALEN);
-
 	wid.id = (u16)WID_MAC_ADDR;
 	wid.type = WID_STR;
 	wid.val = mac_buf;