[ISDN] sc: Fix sndpkt to have the correct number of arguments

isdn_if.writebuf_skb has an additional ack flag argument which
was missing from sndpkt leading to the following warning:
CC [M] drivers/isdn/sc/init.o
drivers/isdn/sc/init.c: In function ‘sc_init’:
drivers/isdn/sc/init.c:281: warning: assignment from incompatible pointer type

Note that this doesn't actually do anything with the flag, it
just fixes the warning (and probably accessing the last argument).

Signed-off-by: Frank Lichtenheld <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/isdn/sc/card.h

···
 int get_card_from_id(int driver);
 int indicate_status(int card, int event, ulong Channel, char *Data);
 irqreturn_t interrupt_handler(int interrupt, void *cardptr);
-int sndpkt(int devId, int channel, struct sk_buff *data);
+int sndpkt(int devId, int channel, int ack, struct sk_buff *data);
 void rcvpkt(int card, RspMessage *rcvmsg);
 int command(isdn_ctrl *cmd);
 int reset(int card);

drivers/isdn/sc/packet.c

···
 #include "message.h"
 #include "card.h"
 
-int sndpkt(int devId, int channel, struct sk_buff *data)
+int sndpkt(int devId, int channel, int ack, struct sk_buff *data)
 {
 	LLData	ReqLnkWrite;
 	int status;