peci: Add peci-npcm controller driver

Add support for Nuvoton NPCM BMC hardware to the Platform Environment
Control Interface (PECI) subsystem.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Tyrone Ting <warp5tw@gmail.com>
Co-developed-by: Iwona Winiarska <iwona.winiarska@intel.com>
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Link: https://lore.kernel.org/r/20230727202126.1477515-3-iwona.winiarska@intel.com