[PATCH] Replace drivers/net/wan custom ctype macros with standard ones

Replace the custom is_digit()/is_hex_digit() macros with
isdigit()/isxdigit() from <linux/ctype.h> Additionaly remove unused macro
is_alpha() from <linux/wanpipe.h>

Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/drivers/net/wan/sdla_fr.c b/drivers/net/wan/sdla_fr.c
index 0497dbd..7f1ce9d 100644
--- a/drivers/net/wan/sdla_fr.c
+++ b/drivers/net/wan/sdla_fr.c
@@ -822,7 +822,7 @@
 	chan->card = card;
 
 	/* verify media address */
-	if (is_digit(conf->addr[0])) {
+	if (isdigit(conf->addr[0])) {
 
 		dlci = dec_to_uint(conf->addr, 0);
 
@@ -3456,7 +3456,7 @@
 	if (!len) 
 		len = strlen(str);
 
-	for (val = 0; len && is_digit(*str); ++str, --len)
+	for (val = 0; len && isdigit(*str); ++str, --len)
 		val = (val * 10) + (*str - (unsigned)'0');
 
 	return val;