staging: wilc1000: use is_broadcast_ether_addr check for broadcast address

Make use of is_broadcast_ether_addr() to check if mac address is broadcast
address. Remove static 'broadcast', as its not needed after use of
is_broadcast_ether_addr().
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/linux_mon.c

@@ -17,7 +17,6 @@ static struct net_device *wilc_wfi_mon; /* global monitor netdev */
 
 static u8 srcadd[6];
 static u8 bssid[6];
-static u8 broadcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 
 #define IEEE80211_RADIOTAP_F_TX_RTS	0x0004  /* used rts/cts handshake */
 #define IEEE80211_RADIOTAP_F_TX_FAIL	0x0001  /* failed due to excessive*/
@@ -164,7 +163,7 @@ static netdev_tx_t wilc_wfi_mon_xmit(struct sk_buff *skb,
 
 	skb_pull(skb, rtap_len);
 
-	if (skb->data[0] == 0xc0 && (!(memcmp(broadcast, &skb->data[4], 6)))) {
+	if (skb->data[0] == 0xc0 && is_broadcast_ether_addr(&skb->data[4])) {
 		skb2 = dev_alloc_skb(skb->len + sizeof(struct wilc_wfi_radiotap_cb_hdr));
 		if (!skb2)
 			return -ENOMEM;