p54: sort channel list by frequency instead of channel index

Some channel indices of the low 5GHz band clash with
those of the 2.4GHz band. Therefore we should go
with the channel's center frequency.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/p54/eeprom.c b/drivers/net/wireless/p54/eeprom.c
index 35b09aa..ec7d4b8 100644
--- a/drivers/net/wireless/p54/eeprom.c
+++ b/drivers/net/wireless/p54/eeprom.c
@@ -93,7 +93,7 @@
 	const struct p54_channel_entry *a = _a;
 	const struct p54_channel_entry *b = _b;
 
-	return a->index - b->index;
+	return a->freq - b->freq;
 }
 
 static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
@@ -291,7 +291,7 @@
 		}
 	}
 
-	/* sort the list by the channel index */
+	/* sort the channel list by frequency */
 	sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
 	     p54_compare_channels, NULL);