mac_pton: Use bool not int return

Use bool instead of int as the return type.

All uses are tested with !.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 4c52907..a9e2268 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -501,7 +501,7 @@
 extern int hex_to_bin(char ch);
 extern int __must_check hex2bin(u8 *dst, const char *src, size_t count);
 
-int mac_pton(const char *s, u8 *mac);
+bool mac_pton(const char *s, u8 *mac);
 
 /*
  * General tracing related utility functions - trace_printk(),