cfg80211: clean up signal type

It wasn't a good idea to make the signal type a per-BSS option,
although then it is closer to the actual value. Move it to be
a per-wiphy setting, update mac80211 to match.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index c063f82..23f4de2 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -63,20 +63,15 @@
 {
 	struct ieee80211_bss *bss;
 	int clen;
-	enum cfg80211_signal_type sigtype = CFG80211_SIGNAL_TYPE_NONE;
 	s32 signal = 0;
 
-	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
-		sigtype = CFG80211_SIGNAL_TYPE_MBM;
+	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 		signal = rx_status->signal * 100;
-	} else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
-		sigtype = CFG80211_SIGNAL_TYPE_UNSPEC;
+	else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 		signal = (rx_status->signal * 100) / local->hw.max_signal;
-	}
 
 	bss = (void *)cfg80211_inform_bss_frame(local->hw.wiphy, channel,
-						mgmt, len, signal, sigtype,
-						GFP_ATOMIC);
+						mgmt, len, signal, GFP_ATOMIC);
 
 	if (!bss)
 		return NULL;