ath5k: ath5k_copy_channels() was not setting the channel band

ath5k_copy_channels() wasn't setting the channel's band so all
driver channels had a 2GHz band set. Lets set this.

Changes-licensed-under: 3-Clause-BSD
Signed-off-by: NLuis R. Rodriguez <mcgrof@winlab.rutgers.edu>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath5k/base.c

@@ -902,6 +902,8 @@ ath5k_copy_channels(struct ath5k_hw *ah,
 
 		/* Write channel info and increment counter */
 		channels[count].center_freq = freq;
+		channels[count].band = (chfreq == CHANNEL_2GHZ) ?
+			IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 		switch (mode) {
 		case AR5K_MODE_11A:
 		case AR5K_MODE_11G: