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: I29672cb229bd07022b00f52105ac1d50ecacca62
diff --git a/extensions/phal/fw_update_watch.hpp b/extensions/phal/fw_update_watch.hpp
index 615e10c..d8d056e 100644
--- a/extensions/phal/fw_update_watch.hpp
+++ b/extensions/phal/fw_update_watch.hpp
@@ -40,7 +40,7 @@
      *  @param[in] bus -  The Dbus bus object
      */
 
-    Watch(sdbusplus::bus::bus& bus) :
+    Watch(sdbusplus::bus_t& bus) :
         addMatch(bus,
                  sdbusplus::bus::match::rules::interfacesAdded() +
                      sdbusplus::bus::match::rules::path(OBJ_SOFTWARE),
@@ -73,7 +73,7 @@
      *
      *  @param[in] msg  - Data associated with subscribed signal
      */
-    void fwIntfAddedCallback(sdbusplus::message::message& msg);
+    void fwIntfAddedCallback(sdbusplus::message_t& msg);
 
     /** @brief sdbusplus signal match for software path add */
     sdbusplus::bus::match_t addMatch;