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/power-sequencer/mihawk-cpld.hpp b/power-sequencer/mihawk-cpld.hpp
index f0af75a..7adf09e 100644
--- a/power-sequencer/mihawk-cpld.hpp
+++ b/power-sequencer/mihawk-cpld.hpp
@@ -37,7 +37,7 @@
      * @param[in] instance - the device instance number
      * @param[in] bus - D-Bus bus object
      */
-    MihawkCPLD(size_t instance, sdbusplus::bus::bus& bus);
+    MihawkCPLD(size_t instance, sdbusplus::bus_t& bus);
 
     /**
      * Analyzes the device for errors when the device is
@@ -107,7 +107,7 @@
     /**
      * The D-Bus bus object
      */
-    sdbusplus::bus::bus& bus;
+    sdbusplus::bus_t& bus;
 
     /**
      * Open CPLD_register via i2c.