hwmon: (pmbus/tps53679) Add support for TPS53685

The TPS53685 is a fully AMD SVI3 compliant step down controller with
trans-inductor voltage regulator(TLVR) topology support, dual channels,
built-in non-volatile memory (NVM), PMBus interface, and full compatible
with TI NexFET smart power stages.

Add support for it to the tps53679 driver.

Signed-off-by: Chiang Brian <chiang.brian@inventec.com>
Link: https://lore.kernel.org/r/20250619064223.3165523-3-chiang.brian@inventec.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>