llc2: Call llc_station_exit() on llc2_init() failure path

Otherwise the station packet handler will remain registered even though
the module is unloaded.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/llc/llc_station.c b/net/llc/llc_station.c
index 45ddbb9..bba5184 100644
--- a/net/llc/llc_station.c
+++ b/net/llc/llc_station.c
@@ -701,7 +701,7 @@
 	llc_main_station.state		= LLC_STATION_STATE_UP;
 }
 
-void __exit llc_station_exit(void)
+void llc_station_exit(void)
 {
 	llc_set_station_handler(NULL);
 }