sys/newlib+shell: use pm_reboot() for reboot()

sys/newlib/syscalls.c

@@ -36,9 +36,9 @@
 #include "board.h"
 #include "sched.h"
 #include "thread.h"
-#include "reboot.h"
 #include "irq.h"
 #include "log.h"
+#include "periph/pm.h"
 
 #include "uart_stdio.h"
 
@@ -83,7 +83,7 @@ __attribute__((used)) void _fini(void)
 void _exit(int n)
 {
     LOG_INFO("#! exit %i: resetting\n", n);
-    reboot();
+    pm_reboot();
     while(1);
 }
 

sys/shell/commands/sc_sys.c

@@ -18,14 +18,14 @@
  * @}
  */
 
-#include "reboot.h"
+#include "periph/pm.h"
 
 int _reboot_handler(int argc, char **argv)
 {
     (void) argc;
     (void) argv;
 
-    reboot();
+    pm_reboot();
 
     return 0;
 }