Fix namespace issue with Hisax

you can pull this  git://git./linux/kernel/git/kkeil/ISDN-2.6 master

rename release_tei() to TEIrelease() because release_tei() was
already exported bei the old HiSax driver.

Signed-off-by: Karsten Keil <kkeil@suse.de>
diff --git a/drivers/isdn/mISDN/layer2.c b/drivers/isdn/mISDN/layer2.c
index f5ad888..a7915a1 100644
--- a/drivers/isdn/mISDN/layer2.c
+++ b/drivers/isdn/mISDN/layer2.c
@@ -2030,7 +2030,7 @@
 	skb_queue_purge(&l2->down_queue);
 	ReleaseWin(l2);
 	if (test_bit(FLG_LAPD, &l2->flag)) {
-		release_tei(l2);
+		TEIrelease(l2);
 		if (l2->ch.st)
 			l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D,
 			    CLOSE_CHANNEL, NULL);