mISDN: Add E-Channel logging features

New prim PH_DATA_E_IND.

 - all E-ch frames are indicated by recv_Echannel(), which pushes E-Channel
   frames into dch's rqueue
 - if dchannel is opened with channel nr 0, no E-Channel logging
   is requested
 - if dchannel is opened with channel nr 1, E-Channel logging
   is requested. if layer1 does not support that, -EINVAL
   in return is appropriate

Signed-off-by: Martin Bachem <m.bachem@gmx.de>
Signed-off-by: Karsten Keil <kkeil@suse.de>
diff --git a/drivers/isdn/mISDN/stack.c b/drivers/isdn/mISDN/stack.c
index 9b9fab4..8cff570 100644
--- a/drivers/isdn/mISDN/stack.c
+++ b/drivers/isdn/mISDN/stack.c
@@ -453,7 +453,7 @@
 		ch->peer = &dev->D.st->own;
 		ch->st = dev->D.st;
 		rq.protocol = protocol;
-		rq.adr.channel = 0;
+		rq.adr.channel = adr->channel;
 		err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq);
 		printk(KERN_DEBUG "%s: ret 1 %d\n", __func__, err);
 		if (err)