mISDN: Use kernel_{send,recv}msg instead of open coding

Reducing the number of direct users of sock_{recv,send}msg.
Modified version to match the latest context.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/mISDN/l1oip.h b/drivers/isdn/mISDN/l1oip.h
index a23d575..bc26c89 100644
--- a/drivers/isdn/mISDN/l1oip.h
+++ b/drivers/isdn/mISDN/l1oip.h
@@ -76,7 +76,7 @@
 	struct sockaddr_in	sin_local;	/* local socket name */
 	struct sockaddr_in	sin_remote;	/* remote socket name */
 	struct msghdr		sendmsg;	/* ip message to send */
-	struct iovec		sendiov;	/* iov for message */
+	struct kvec		sendiov;	/* iov for message */
 
 	/* frame */
 	struct l1oip_chan	chan[128];	/* channel instances */