hwmon: (pmbus) Add support for Infineon Digital Multi-phase xdp152 family controllers

Add support for devices XDPE152C4, XDPE12584.

Signed-off-by: Greg Schwendimann <Greg.Schwendimann@infineon.com>
Link: https://lore.kernel.org/r/5e6d50e9b28140158f339b0de343eea4@infineon.com


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