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.h b/drivers/isdn/mISDN/layer2.h
index de2dd02..6293f80 100644
--- a/drivers/isdn/mISDN/layer2.h
+++ b/drivers/isdn/mISDN/layer2.h
@@ -96,7 +96,7 @@
 
 /* from tei.c */
 extern int 		l2_tei(struct layer2 *, u_int, u_long arg);
-extern void 		release_tei(struct layer2 *);
+extern void 		TEIrelease(struct layer2 *);
 extern int 		TEIInit(u_int *);
 extern void 		TEIFree(void);