Use correct bit order of RAW channels at misdn driver

mISDN Kernel driver uses reversed bit order for RAW (transparent)
channels. With this patch, the order is reversed. Now it uses the
same bit order as RTP payload does. Also it uses same bit order as
other drivers do, like dahdi and e1d.

Change-Id: I77b899bceacdf5484ea9a841cad55775864b4c82
diff --git a/src/input/misdn.c b/src/input/misdn.c
index fc06857..9c3da98 100644
--- a/src/input/misdn.c
+++ b/src/input/misdn.c
@@ -514,6 +514,7 @@
 
 	LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "RAW CHAN TX: %s\n", osmo_hexdump(msg->data, msg->len));
 
+	osmo_revbytebits_buf(msg->data, msg->len);
 	hh = (struct mISDNhead *) msgb_push(msg, sizeof(*hh));
 	hh->prim = PH_DATA_REQ;
 	hh->id = 0;
@@ -560,6 +561,7 @@
 	case PH_DATA_IND:
 		/* remove the Misdn Header */
 		msg->l2h = msgb_pull(msg, MISDN_HEADER_LEN);
+		osmo_revbytebits_buf(msg->data, msg->len);
 		LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "RAW CHAN RX: %s\n",
 			osmo_hexdump(msgb_l2(msg), msgb_l2len(msg)));
 		return e1inp_rx_ts(e1i_ts, msg, 0, 0);