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/cpuinfo.hpp b/include/cpuinfo.hpp
index ac26c60..e4f4d76 100644
--- a/include/cpuinfo.hpp
+++ b/include/cpuinfo.hpp
@@ -43,7 +43,7 @@
 
 struct CPUInfo : public UniqueIdentifierBase
 {
-    CPUInfo(sdbusplus::bus::bus& bus, const size_t cpuId,
+    CPUInfo(sdbusplus::bus_t& bus, const size_t cpuId,
             const uint8_t peciAddress, const uint8_t i2cBusNum,
             const uint8_t i2cSlaveAddress) :
         // use defer_emit for UniqueIdentifier iface so that ObjectMapper