Use InfiniTime Watchdog.h by providing mdk/nrf.h and others

sim/nrfx/mdk/nrf52.cpp

@@ -0,0 +1,19 @@
+#include "mdk/nrf52.h"
+
+// pointer variable used by the rest of the code, and its initialization
+NRF_WDT_Type *NRF_WDT;
+void init_NRF_WDT()
+{
+  static NRF_WDT_Type NRF_WDT_object;
+  NRF_WDT = &NRF_WDT_object;
+}
+
+// pointer variable used by the rest of the code, and its initialization
+NRF_POWER_Type *NRF_POWER;
+void init_NRF_POWER()
+{
+  static NRF_POWER_Type NRF_POWER_object;
+  NRF_POWER = &NRF_POWER_object;
+  // sim: always return ResetPin as reason for reboot
+  NRF_POWER->RESETREAS = 0x01;
+}