hwmon: Add support for HiTRON HAC300S PSU

hwmon: Add support for HiTRON HAC300S PSU

Add Support for HiTRON HAC300S PSU. This is a AC/DC hot-swappable
CompactPCI Serial Dual output active current sharing switching power
supply with a 312W rating.

Signed-off-by: Vasileios Amoiridis <vasileios.amoiridis@cern.ch>
Link: https://lore.kernel.org/r/20260119190806.35276-3-vassilisamir@gmail.com
[groeck: Fix whitespace / alignment problems; return -ENODATA from
 hac300s_read_byte_data() if the PMBus core can handle the operation]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>