[PATCH] libertas: remove adapter->listeninterval

listeninterval was initialized with MRVDRV_DEFAULT_LISTEN_INTERVAL, but
there exists that would ever change it. So we can use this define directly.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/join.c b/drivers/net/wireless/libertas/join.c
index 0bded0c..e335a7e 100644
--- a/drivers/net/wireless/libertas/join.c
+++ b/drivers/net/wireless/libertas/join.c
@@ -369,7 +369,7 @@
 	pos += sizeof(passo->peerstaaddr);
 
 	/* set the listen interval */
-	passo->listeninterval = cpu_to_le16(adapter->listeninterval);
+	passo->listeninterval = cpu_to_le16(MRVDRV_DEFAULT_LISTEN_INTERVAL);
 
 	pos += sizeof(passo->capability);
 	pos += sizeof(passo->listeninterval);