iichid(4): Implement I2CRDWR command in hid_ioctl method

This command is intended to be compatible with I2CRDWR ioctl.
It is required to perform arbitrary I2C transfers by device
drivers which can switch between HID and native non-HID modes.

(cherry picked from commit 6b1da3d223a88d544439d1be4115714f0aee75be)