Separate nrf52/cm4 interrupt handling

src/platform/cm4/InterruptHandler.cc

@@ -0,0 +1,26 @@
+#include <assert.h>
+
+#include "platform/cm4/InterruptHandler.h"
+#include "platform/cm4/InterruptGuardian.h"
+
+using namespace pinetime::platform::cm4;
+
+InterruptHandler::InterruptHandler(uint32_t irq_nr)
+{
+    InterruptGuardian::instance.register_handler(static_cast<InterruptGuardian::Cm4IrqN>(irq_nr), *this);
+}
+
+void InterruptHandler::handle()
+{
+    assert(false);
+}
+
+void InterruptHandler::enable()
+{
+    assert(false);
+}
+
+void InterruptHandler::disable()
+{
+    assert(false);
+}