esp8266: Refactor to use extmod implementation of software SPI class.
diff --git a/esp8266/modmachine.c b/esp8266/modmachine.c
index 29a72f7..a92362c 100644
--- a/esp8266/modmachine.c
+++ b/esp8266/modmachine.c
@@ -255,7 +255,7 @@
     { MP_ROM_QSTR(MP_QSTR_ADC), MP_ROM_PTR(&pyb_adc_type) },
     { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&pyb_uart_type) },
     { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&machine_i2c_type) },
-    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&pyb_hspi_type) },
+    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&machine_hspi_type) },
 
     // wake abilities
     { MP_ROM_QSTR(MP_QSTR_DEEPSLEEP), MP_ROM_INT(MACHINE_WAKE_DEEPSLEEP) },