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: Ibc88a5de1e7a11d332410985f29698b24aeae983
diff --git a/include/cpu.hpp b/include/cpu.hpp
index 276e64a..92616c6 100644
--- a/include/cpu.hpp
+++ b/include/cpu.hpp
@@ -118,9 +118,8 @@
     Cpu& operator=(Cpu&&) = delete;
     ~Cpu() = default;
 
-    Cpu(sdbusplus::bus::bus& bus, const std::string& objPath,
-        const uint8_t& cpuId, uint8_t* smbiosTableStorage,
-        const std::string& motherboard) :
+    Cpu(sdbusplus::bus_t& bus, const std::string& objPath, const uint8_t& cpuId,
+        uint8_t* smbiosTableStorage, const std::string& motherboard) :
         sdbusplus::server::object_t<processor, asset, location, connector, rev,
                                     Item, association>(bus, objPath.c_str()),
         cpuNum(cpuId), storage(smbiosTableStorage), motherboardPath(motherboard)