board: traverse: add Ten64 board controller driver

board: traverse: add Ten64 board controller driver

Traverse Technologies Ten64 family boards use a microcontroller
to control low level board functions like startup and reset,
as well as holding details such as the board MAC address.

Communication between the CPU and microcontroller is via
I2C.

To keep the driver structure clean between the Ten64 board
file, DM_I2C, and a future utility command, this driver
has been implemented as a misc uclass device.

Signed-off-by: Mathew McBride <matt@traverse.com.au>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>