sdbusplus: use shorter type aliases

The sdbusplus headers provide shortened aliases for many types.
Switch to using them to provide better code clarity and shorter
lines.  Possible replacements are for:
  * bus_t
  * exception_t
  * manager_t
  * match_t
  * message_t
  * object_t
  * slot_t

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ief05bd757cffb1453e058a719ee4b060861752e7
diff --git a/phosphor-power-sequencer/src/power_control.hpp b/phosphor-power-sequencer/src/power_control.hpp
index f659744..0e37f7e 100644
--- a/phosphor-power-sequencer/src/power_control.hpp
+++ b/phosphor-power-sequencer/src/power_control.hpp
@@ -18,7 +18,7 @@
 namespace phosphor::power::sequencer
 {
 
-using PowerObject = sdbusplus::server::object::object<PowerInterface>;
+using PowerObject = sdbusplus::server::object_t<PowerInterface>;
 
 /**
  * @class PowerControl
@@ -40,7 +40,7 @@
      * @param bus D-Bus bus object
      * @param event event object
      */
-    PowerControl(sdbusplus::bus::bus& bus, const sdeventplus::Event& event);
+    PowerControl(sdbusplus::bus_t& bus, const sdeventplus::Event& event);
 
     /** @copydoc PowerInterface::getPgood() */
     int getPgood() const override;
@@ -55,7 +55,7 @@
      * Callback function to handle interfacesAdded D-Bus signals
      * @param msg Expanded sdbusplus message data
      */
-    void interfacesAddedHandler(sdbusplus::message::message& msg);
+    void interfacesAddedHandler(sdbusplus::message_t& msg);
 
     /** @copydoc PowerInterface::setPgoodTimeout() */
     void setPgoodTimeout(int timeout) override;
@@ -70,7 +70,7 @@
     /**
      * The D-Bus bus object
      */
-    sdbusplus::bus::bus& bus;
+    sdbusplus::bus_t& bus;
 
     /**
      * The power sequencer device to monitor.