hwmon: (pmbus) Add support for Intel VID protocol VR13

The below lists of VOUT_MODE command readout with their related VID
protocols, Digital to Analog Converter steps:
- VR13.0 mode, 10-mV DAC - 0x24
- VR13.0 mode, 5-mV DAC - 0x27

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index bfcb13b..4efa2bd 100644
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -341,7 +341,7 @@
 #define PMBUS_HAVE_STATUS_VMON	BIT(19)
 
 enum pmbus_data_format { linear = 0, direct, vid };
-enum vrm_version { vr11 = 0, vr12 };
+enum vrm_version { vr11 = 0, vr12, vr13 };
 
 struct pmbus_driver_info {
 	int pages;		/* Total number of pages */