Fix all boards and move diff to directory

boards/nordic/nrf52840_mdk_dfu/src/main.rs

@@ -268,8 +268,14 @@ pub unsafe fn reset_handler() {
         nrf52840::nvmc::SyscallDriver::new(
             &nrf52840::nvmc::NVMC,
             board_kernel.create_grant(&memory_allocation_capability),
+            dynamic_deferred_caller,
         )
     );
+    nvmc.set_deferred_handle(
+        dynamic_deferred_caller
+            .register(nvmc)
+            .expect("no deferred call slot available for nvmc"),
+    );
 
     // Configure USB controller
     let usb: