Add support for MPS VR controller mp2993. This driver exposes
telemetry and limits value readings and writtings.
Signed-off-by: Noah Wang <noahwang.wang@outlook.com>
Link: https://lore.kernel.org/r/SEYPR04MB648203DC017A514837DB1204FAC72@SEYPR04MB6482.apcprd04.prod.outlook.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>