*: rename ATTRIBUTE_XXX to just XXX.

diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index d2138dd..5caa00c 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -123,7 +123,7 @@
 
 
 int udhcpc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int udhcpc_main(int argc UNUSED_PARAM, char **argv)
 {
 	uint8_t *temp, *message;
 	char *str_c, *str_V, *str_h, *str_F, *str_r;