[MAC80211]: fix warnings introduced by the doc patches

This fixes a warning about NUM_IEEE80211_MODES missing
in a switch statement. Intentionally do not add a default
case so we get warnings at these places if we need to add
new modes.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mac80211/util.c

@@ -98,6 +98,9 @@ void ieee80211_prepare_rates(struct ieee80211_local *local,
 			    rate->rate == 55 || rate->rate == 110)
 				rate->flags |= IEEE80211_RATE_BASIC;
 			break;
+		case NUM_IEEE80211_MODES:
+			/* not useful */
+			break;
 		}
 
 		/* Set ERP and MANDATORY flags based on phymode */
@@ -118,6 +121,9 @@ void ieee80211_prepare_rates(struct ieee80211_local *local,
 			    rate->rate == 240)
 				rate->flags |= IEEE80211_RATE_MANDATORY;
 			break;
+		case NUM_IEEE80211_MODES:
+			/* not useful */
+			break;
 		}
 		if (ieee80211_is_erp_rate(mode->mode, rate->rate))
 			rate->flags |= IEEE80211_RATE_ERP;