serial: max310x: add I2C device table for instantiation from userspace

This allows to instantiate a max14830 I2C device from userspace.

Helpful when testing driver with i2c-stub.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://lore.kernel.org/r/20240118152213.2644269-3-hugo@hugovil.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>