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-regulators/src/interfaces/manager_interface.cpp b/phosphor-regulators/src/interfaces/manager_interface.cpp
index 9e1cb34..81196c1 100644
--- a/phosphor-regulators/src/interfaces/manager_interface.cpp
+++ b/phosphor-regulators/src/interfaces/manager_interface.cpp
@@ -33,7 +33,7 @@
 namespace interface
 {
 
-ManagerInterface::ManagerInterface(sdbusplus::bus::bus& bus, const char* path) :
+ManagerInterface::ManagerInterface(sdbusplus::bus_t& bus, const char* path) :
     _serverInterface(bus, path, interface, _vtable, this)
 {}
 
@@ -44,7 +44,7 @@
     {
         try
         {
-            auto m = sdbusplus::message::message(msg);
+            auto m = sdbusplus::message_t(msg);
 
             auto mgrObj = static_cast<ManagerInterface*>(context);
             mgrObj->configure();
@@ -77,7 +77,7 @@
         try
         {
             bool enable{};
-            auto m = sdbusplus::message::message(msg);
+            auto m = sdbusplus::message_t(msg);
 
             m.read(enable);
 
diff --git a/phosphor-regulators/src/interfaces/manager_interface.hpp b/phosphor-regulators/src/interfaces/manager_interface.hpp
index 3f262d3..6f4abe0 100644
--- a/phosphor-regulators/src/interfaces/manager_interface.hpp
+++ b/phosphor-regulators/src/interfaces/manager_interface.hpp
@@ -41,7 +41,7 @@
      * @param[in] bus - Bus to attach to.
      * @param[in] path - Path to attach at.
      */
-    ManagerInterface(sdbusplus::bus::bus& bus, const char* path);
+    ManagerInterface(sdbusplus::bus_t& bus, const char* path);
 
     /**
      * @brief Implementation for the configure method