bus device: properly register submodules

Closes: #6066 (except for similar work that needs to be done in ulab)

Author: jepler

shared-bindings/adafruit_bus_device/__init__.c

@@ -78,3 +78,5 @@ const mp_obj_module_t adafruit_bus_device_module = {
 };
 
 MP_REGISTER_MODULE(MP_QSTR_adafruit_bus_device, adafruit_bus_device_module, CIRCUITPY_BUSDEVICE);
+MP_REGISTER_MODULE(MP_QSTR_adafruit_bus_device_dot_i2c_device, adafruit_bus_device_i2c_device_module, CIRCUITPY_BUSDEVICE);
+MP_REGISTER_MODULE(MP_QSTR_adafruit_bus_device_dot_spi_device, adafruit_bus_device_spi_device_module, CIRCUITPY_BUSDEVICE);