zephyr/machine_i2c: Use stdint.h types.
Zephyr migrated to use uint8_t, etc. instead of u8_t, etc.
@@ -97,7 +97,7 @@ STATIC int machine_hard_i2c_transfer_single(mp_obj_base_t *self_in, uint16_t add
struct i2c_msg msg;
int ret;
- msg.buf = (u8_t *)buf;
+ msg.buf = (uint8_t *)buf;
msg.len = len;
msg.flags = 0;
