Pimoroni I2C: Update to use modmachine.h consolidated header.

micropython/modules/pimoroni_i2c/pimoroni_i2c.cpp

@@ -8,7 +8,7 @@ using namespace pimoroni;
 extern "C" {
 #include "pimoroni_i2c.h"
 #include "py/mperrno.h"
-#include "extmod/machine_i2c.h"
+#include "extmod/modmachine.h"
 
 
 _PimoroniI2C_obj_t*  PimoroniI2C_from_machine_i2c_or_native(mp_obj_t i2c_obj) {

micropython/modules/pimoroni_i2c/pimoroni_i2c.h

@@ -1,6 +1,6 @@
 // Include MicroPython API.
 #include "py/runtime.h"
-#include "extmod/machine_i2c.h"
+#include "extmod/modmachine.h"
 #include "hardware/i2c.h"
 
 /***** Extern of Class Definition *****/