hwmon: (pmbus) Add ON_OFF_CONFIG register bits

Add bits found in the ON_OFF_CONFIG register.
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Naresh Solanki <Naresh.Solanki@9elements.com>
Link: https://lore.kernel.org/r/20230831190731.265099-2-Naresh.Solanki@9elements.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/pmbus/pmbus.h

@@ -243,6 +243,15 @@ enum pmbus_regs {
  */
 #define PB_OPERATION_CONTROL_ON		BIT(7)
 
+/*
+ * ON_OFF_CONFIG
+ */
+#define PB_ON_OFF_CONFIG_POWERUP_CONTROL	BIT(4)
+#define PB_ON_OFF_CONFIG_OPERATION_REQ		BIT(3)
+#define PB_ON_OFF_CONFIG_EN_PIN_REQ		BIT(2)
+#define PB_ON_OFF_CONFIG_POLARITY_HIGH		BIT(1)
+#define PB_ON_OFF_CONFIG_TURN_OFF_FAST		BIT(0)
+
 /*
  * WRITE_PROTECT
  */