wireless-next-2.6: brcm80211: fix compile issue

Commit 59eb21a65047 "cfg80211: Extend channel to frequency mapping for 802.11j"
changed the definition of the ieee80211_channel_to_frequency; so fix its
usage in brcmfmac.

Signed-off-by: Stanislav Fomichev <kernel@fomichev.me>
Reviewed-by: Henry Ptasinski <henryp@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c

@@ -2313,7 +2313,9 @@ static s32 wl_inform_single_bss(struct wl_priv *wl, struct wl_bss_info *bi)
 	notif_bss_info->frame_len =
 	    offsetof(struct ieee80211_mgmt,
 		     u.beacon.variable) + wl_get_ielen(wl);
-	freq = ieee80211_channel_to_frequency(notif_bss_info->channel);
+	freq = ieee80211_channel_to_frequency(notif_bss_info->channel,
+					      band->band);
+
 	channel = ieee80211_get_channel(wiphy, freq);
 
 	WL_DBG("SSID : \"%s\", rssi %d, channel %d, capability : 0x04%x, bssid %pM\n",