cpu/stm32f0: use common STM32 files

cpu/stm32f0/Makefile

@@ -2,6 +2,6 @@
 MODULE = cpu
 
 # add a list of subdirectories, that should also be build
-DIRS = periph $(RIOTCPU)/cortexm_common
+DIRS = periph $(RIOTCPU)/cortexm_common $(RIOTCPU)/stm32_common
 
 include $(RIOTBASE)/Makefile.base

cpu/stm32f0/Makefile.include

@@ -1,6 +1,5 @@
 export CPU_ARCH = cortex-m0
+export CPU_FAM  = stm32f0
 
-# use common periph functions
-USEMODULE += periph_common
-
+include $(RIOTCPU)/stm32_common/Makefile.include
 include $(RIOTCPU)/Makefile.include.cortexm_common

cpu/stm32f0/include/periph_cpu.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2015 Freie Universität Berlin
+ * Copyright (C) 2015-2016 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
@@ -16,10 +16,11 @@
  * @author          Hauke Petersen <hauke.peterse@fu-berlin.de>
  */
 
-#ifndef PERIPH_CPU_H_
-#define PERIPH_CPU_H_
+#ifndef PERIPH_CPU_H
+#define PERIPH_CPU_H
 
-#include "periph/dev_enums.h"
+#include "cpu.h"
+#include "periph_cpu_common.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -43,5 +44,5 @@ extern "C" {
 }
 #endif
 
-#endif /* PERIPH_CPU_H_ */
+#endif /* PERIPH_CPU_H */
 /** @} */