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/ucd90160.cpp b/power-sequencer/ucd90160.cpp
index 72728e4..3801d40 100644
--- a/power-sequencer/ucd90160.cpp
+++ b/power-sequencer/ucd90160.cpp
@@ -50,7 +50,7 @@
 namespace device_error = sdbusplus::xyz::openbmc_project::Common::Device::Error;
 namespace power_error = sdbusplus::org::open_power::Witherspoon::Fault::Error;
 
-UCD90160::UCD90160(size_t instance, sdbusplus::bus::bus& bus) :
+UCD90160::UCD90160(size_t instance, sdbusplus::bus_t& bus) :
     Device(DEVICE_NAME, instance),
     interface(std::get<ucd90160::pathField>(deviceMap.find(instance)->second),
               DRIVER_NAME, instance),