media: i2c: Add driver of Arducam Pivariety series camera

Add a driver for the Arducam Pivariety series CSI2 camera sensor.

Signed-off-by: Lee Jackson <info@arducam.com>

SQUASH: Fix VIDEO_ARDUCAM_PIVARIETY Kconfig entry

The cherry-pick from rpi-5.17.y put it in the wrong section, and failed
to update it for 5.18.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>