[PATCH] drivers/isdn/hisax/: proper prototypes

- add functions prototypes for some global functions to header files

- remove unneeded "extern"s from some function prototypes

You might note that this patch results in a new warning - that's due to the
fact that with a proper prototype gcc is able to discover a broken
work_struct conversion.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/isdn/hisax/isdnl1.h

@@ -21,12 +21,11 @@
 #define B_XMTBUFREADY	1
 #define B_ACKPENDING	2
 
-extern void debugl1(struct IsdnCardState *cs, char *fmt, ...);
-extern void DChannel_proc_xmt(struct IsdnCardState *cs);
-extern void DChannel_proc_rcv(struct IsdnCardState *cs);
-extern void l1_msg(struct IsdnCardState *cs, int pr, void *arg);
-extern void l1_msg_b(struct PStack *st, int pr, void *arg);
-
-#ifdef L2FRAME_DEBUG
-extern void Logl2Frame(struct IsdnCardState *cs, struct sk_buff *skb, char *buf, int dir);
-#endif
+void debugl1(struct IsdnCardState *cs, char *fmt, ...);
+void DChannel_proc_xmt(struct IsdnCardState *cs);
+void DChannel_proc_rcv(struct IsdnCardState *cs);
+void l1_msg(struct IsdnCardState *cs, int pr, void *arg);
+void l1_msg_b(struct PStack *st, int pr, void *arg);
+void Logl2Frame(struct IsdnCardState *cs, struct sk_buff *skb, char *buf,
+		int dir);
+void BChannel_bh(struct work_struct *work);