iwlegacy: use ether_addr_equal_64bits

Ether_addr_equal_64bits is more efficient than ether_addr_equal, and can be
used when each argument is an array within a structure that contains at
least two bytes of data beyond the array.

The structures involved are:
ieee80211_hdr defined in include/linux/ieee80211.h,
il_priv defined in drivers/net/wireless/iwlegacy/common.h and
il_rxon_cmd defined in drivers/net/wireless/iwlegacy/commands.h

This was done using Coccinelle (http://coccinelle.lip6.fr/).

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlegacy/3945.c

@@ -466,10 +466,10 @@ il3945_is_network_packet(struct il_priv *il, struct ieee80211_hdr *header)
 	switch (il->iw_mode) {
 	case NL80211_IFTYPE_ADHOC:	/* Header: Dest. | Source    | BSSID */
 		/* packets to our IBSS update information */
-		return ether_addr_equal(header->addr3, il->bssid);
+		return ether_addr_equal_64bits(header->addr3, il->bssid);
 	case NL80211_IFTYPE_STATION:	/* Header: Dest. | AP{BSSID} | Source */
 		/* packets to our IBSS update information */
-		return ether_addr_equal(header->addr2, il->bssid);
+		return ether_addr_equal_64bits(header->addr2, il->bssid);
 	default:
 		return 1;
 	}