Standardize command usage messages with cmd_usage()

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/board/lwmon5/lwmon5.c b/board/lwmon5/lwmon5.c
index aa62f37..adecad0 100644
--- a/board/lwmon5/lwmon5.c
+++ b/board/lwmon5/lwmon5.c
@@ -467,7 +467,7 @@
 int do_eeprom_wp(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	if (argc < 2) {
-		printf("Usage:\n%s\n", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return 1;
 	}
 
@@ -476,7 +476,7 @@
 	} else if ((strcmp(argv[1], "off") == 0)) {
 		gpio_write_bit(CONFIG_SYS_GPIO_EEPROM_EXT_WP, 0);
 	} else {
-		printf("Usage:\n%s\n", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return 1;
 	}