nanohub: drivers: add InvenSense ICM406xx IMU driver

This driver supports ICM40604 and ICM40605.

Supported sensor types:
 * Accelerometer
 * Gyroscope
 * Any Motion
 * No Motion

This driver utilizes AOSP bias calibration algorithm for Accelerometer and Gyroscope.

Test: tested on reworked nexus6p
Change-Id: I51ed249567327251d31f29b34123410e155c626c
Signed-off-by: Eiji Iwatsuki <eiwatsuki@invensense.com>