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

Change-Id: I0e907f161bc6aec5e2253893f4ad7189cb8d5705
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/oem/ibm/libpldmresponder/collect_slot_vpd.cpp b/oem/ibm/libpldmresponder/collect_slot_vpd.cpp
index 2d0f4f9..ff5e705 100644
--- a/oem/ibm/libpldmresponder/collect_slot_vpd.cpp
+++ b/oem/ibm/libpldmresponder/collect_slot_vpd.cpp
@@ -162,7 +162,7 @@
         propertiesChanged(adapterObjectPath,
                           "xyz.openbmc_project.Inventory.Item"),
         [this, adapterObjectPath, stateFieldValue,
-         entity](sdbusplus::message::message& msg) {
+         entity](sdbusplus::message_t& msg) {
             pldm::utils::DbusChangedProps props{};
             std::string intf;
             msg.read(intf, props);