Bluetooth: Fix error return value on sendmsg.

When the socket is in a bad state EBADFD is more appropriate then EINVAL.

Signed-off-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
Acked-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 884b840..ac25952 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1881,7 +1881,7 @@
 
 	default:
 		BT_DBG("bad state %1.1x", pi->mode);
-		err = -EINVAL;
+		err = -EBADFD;
 	}
 
 done: