pseq: Add named GPIO properties

Add the new named GPIO properties from the JSON config file to the
power sequencer device class hierarchy.

New JSON GPIO properties:
* power_control_gpio_name
* power_good_gpio_name

Power sequencer device class hierarchy:
* PowerSequencerDevice   (power_sequencer_device.*)
  * StandardDevice       (standard_device.*)
    * PMBusDriverDevice  (pmbus_driver_device.*)
      * UCD90xDevice     (ucd90x_device.*)
        * UCD90160Device (ucd90160_device.*)
        * UCD90320Device (ucd90320_device.*)

Tested:
* Ran automated tests. All ran successfully.

Change-Id: Idcccee89eb09cb7d135f45aeb4f6dfe8299adf43
Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
diff --git a/phosphor-power-sequencer/src/ucd90320_device.hpp b/phosphor-power-sequencer/src/ucd90320_device.hpp
index cadcbf6..87a5cc7 100644
--- a/phosphor-power-sequencer/src/ucd90320_device.hpp
+++ b/phosphor-power-sequencer/src/ucd90320_device.hpp
@@ -50,13 +50,19 @@
      *
      * @param bus I2C bus for the device
      * @param address I2C address for the device
+     * @param powerControlGPIOName Name of the GPIO that turns this device on
+     *                             and off
+     * @param powerGoodGPIOName Name of the GPIO that reads the power good
+     *                          signal from this device
      * @param rails Voltage rails that are enabled and monitored by this device
      * @param services System services like hardware presence and the journal
      */
-    explicit UCD90320Device(uint8_t bus, uint16_t address,
-                            std::vector<std::unique_ptr<Rail>> rails,
-                            Services& services) :
-        UCD90xDevice(deviceName, bus, address, std::move(rails), services)
+    explicit UCD90320Device(
+        uint8_t bus, uint16_t address, const std::string& powerControlGPIOName,
+        const std::string& powerGoodGPIOName,
+        std::vector<std::unique_ptr<Rail>> rails, Services& services) :
+        UCD90xDevice(deviceName, bus, address, powerControlGPIOName,
+                     powerGoodGPIOName, std::move(rails), services)
     {}
 
     constexpr static std::string deviceName{"UCD90320"};