mac80211: fix a compiler warning

net/mac80211/mlme.c: In function 'ieee80211_sta_work':
net/mac80211/mlme.c:1981: warning: too many arguments for format

Introduced by commit 04ac3c0ee2c773c321ec472d892635a20556f34d
("mac80211: speed up AP probing using nullfunc frames").

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 59e2e06..45fbb9e 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1982,8 +1982,7 @@
 				wiphy_debug(local->hw.wiphy,
 					    "%s: No ack for nullfunc frame to"
 					    " AP %pM, disconnecting.\n",
-					    sdata->name, bssid,
-					    ifmgd->probe_send_count);
+					    sdata->name, bssid);
 #endif
 				ieee80211_sta_connection_lost(sdata, bssid);
 			}