cfg80211: Fix signal_type comparison

signal_type is enum cfg80211_signal_type.

This fixes the gcc warning:

scan.c: In function `cfg80211_inform_bss':
scan.c:518:6: warning: comparison between `enum cfg80211_signal_type' and `enum nl80211_bss'
scan.c: In function `cfg80211_inform_bss_frame':
scan.c:574:6: warning: comparison between `enum cfg80211_signal_type' and `enum nl80211_bss'

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index a026c6d..58401d2 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -515,7 +515,7 @@
 
 	privsz = wiphy->bss_priv_size;
 
-	if (WARN_ON(wiphy->signal_type == NL80211_BSS_SIGNAL_UNSPEC &&
+	if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC &&
 			(signal < 0 || signal > 100)))
 		return NULL;
 
@@ -571,7 +571,7 @@
 				      u.probe_resp.variable);
 	size_t privsz = wiphy->bss_priv_size;
 
-	if (WARN_ON(wiphy->signal_type == NL80211_BSS_SIGNAL_UNSPEC &&
+	if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC &&
 	            (signal < 0 || signal > 100)))
 		return NULL;