common: command add '\n' for debug msg

Add '\n' for debug msg.
Signed-off-by: NPeng Fan <Peng.Fan@freescale.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: NSimon Glass <sjg@chromium.org>

common/command.c

@@ -492,7 +492,7 @@ static int cmd_call(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 
 	result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
 	if (result)
-		debug("Command failed, result=%d", result);
+		debug("Command failed, result=%d\n", result);
 	return result;
 }