hwmon: (pmbus) Add MAX20796 to devices supported by generic pmbus driver

MAX20796 is a dual-phase scalable integrated voltage regulator with
PMBus interface.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/hwmon/pmbus.rst

@@ -63,6 +63,16 @@ Supported chips:
 
 	http://www.ti.com/lit/gpn/tps544c25
 
+  * Maxim MAX20796
+
+    Prefix: 'max20796'
+
+    Addresses scanned: -
+
+    Datasheet:
+
+	Not published
+
   * Generic PMBus devices
 
     Prefix: 'pmbus'

drivers/hwmon/pmbus/Kconfig

@@ -20,8 +20,8 @@ config SENSORS_PMBUS
 	help
 	  If you say yes here you get hardware monitoring support for generic
 	  PMBus devices, including but not limited to ADP4000, BMR453, BMR454,
-	  MDT040, NCP4200, NCP4208, PDT003, PDT006, PDT012, TPS40400, TPS544B20,
-	  TPS544B25, TPS544C20, TPS544C25, and UDT020.
+	  MAX20796, MDT040, NCP4200, NCP4208, PDT003, PDT006, PDT012, TPS40400,
+	  TPS544B20, TPS544B25, TPS544C20, TPS544C25, and UDT020.
 
 	  This driver can also be built as a module. If so, the module will
 	  be called pmbus.

drivers/hwmon/pmbus/pmbus.c

@@ -210,6 +210,7 @@ static const struct i2c_device_id pmbus_id[] = {
 	{"dps460", (kernel_ulong_t)&pmbus_info_one_skip},
 	{"dps650ab", (kernel_ulong_t)&pmbus_info_one_skip},
 	{"dps800", (kernel_ulong_t)&pmbus_info_one_skip},
+	{"max20796", (kernel_ulong_t)&pmbus_info_one},
 	{"mdt040", (kernel_ulong_t)&pmbus_info_one},
 	{"ncp4200", (kernel_ulong_t)&pmbus_info_one},
 	{"ncp4208", (kernel_ulong_t)&pmbus_info_one},