drivers/isdn: Remove unnecessary casts of private_data

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/hysdn/hysdn_proclog.c b/drivers/isdn/hysdn/hysdn_proclog.c
index 37a9dd3..7003698 100644
--- a/drivers/isdn/hysdn/hysdn_proclog.c
+++ b/drivers/isdn/hysdn/hysdn_proclog.c
@@ -158,7 +158,7 @@
 	int found = 0;
 	unsigned char *cp, valbuf[128];
 	long base = 10;
-	hysdn_card *card = (hysdn_card *) file->private_data;
+	hysdn_card *card = file->private_data;
 
 	if (count > (sizeof(valbuf) - 1))
 		count = sizeof(valbuf) - 1;	/* limit length */