cfg80211: fix gHz to GHz

There's no "g" prefix, only "G" (1e9) that was clearly intended here.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/core.c b/net/wireless/core.c
index a83037d..b091551 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -639,7 +639,7 @@
 		if (WARN_ON(!sband->n_channels))
 			return -EINVAL;
 		/*
-		 * on 60gHz band, there are no legacy rates, so
+		 * on 60GHz band, there are no legacy rates, so
 		 * n_bitrates is 0
 		 */
 		if (WARN_ON(band != IEEE80211_BAND_60GHZ &&