cpu: lpc1768: adapt to periph/pm

cpu/lpc1768/Makefile.include

@@ -1,3 +1,5 @@
 export CPU_ARCH = cortex-m3
 
+USEMODULE += periph_common
+
 include $(RIOTCPU)/Makefile.include.cortexm_common

cpu/lpc1768/reboot_arch.c

@@ -1,31 +0,0 @@
-/*
- * Copyright (C) 2016 Kaspar Schleiser <kaspar@schleiser.de>
- *               2014 Freie Universität Berlin
- *
- * This file is subject to the terms and conditions of the GNU Lesser General
- * Public License v2.1. See the file LICENSE in the top level directory for more
- * details.
- */
-
-/**
- * @ingroup     cpu_lpc1768
- * @{
- *
- * @file
- * @brief       Implementation of the kernels reboot interface
- *
- * @author      Oliver Hahm <oliver.hahm@inria.fr>
- * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
- * @author      Kaspar Schleiser <kaspar@schleiser.de>
- *
- * @}
- */
-
-#include <stdio.h>
-
-#include "cpu.h"
-
-void reboot(void)
-{
-    NVIC_SystemReset();
-}