hwmon: (pmbus) Add support for MAX20751

MAX20751 is a multiphase power controller with internal buck converter.
It uses VR12.0 to report the output voltage. This requires an explicit
driver, since the VR version can not be auto-detected.

The chip supports a manufacturer specific command to fine-tune the output
voltage.  This command is not currently supported.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/MAINTAINERS b/MAINTAINERS
index a9ae6c1..6a406b6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6539,6 +6539,13 @@
 F:	Documentation/hwmon/max16065
 F:	drivers/hwmon/max16065.c
 
+MAX20751 HARDWARE MONITOR DRIVER
+M:	Guenter Roeck <linux@roeck-us.net>
+L:	lm-sensors@lm-sensors.org
+S:	Maintained
+F:	Documentation/hwmon/max20751
+F:	drivers/hwmon/max20751.c
+
 MAX6650 HARDWARE MONITOR AND FAN CONTROLLER DRIVER
 M:	"Hans J. Koch" <hjk@hansjkoch.de>
 L:	lm-sensors@lm-sensors.org