ipmid: Update sdbuspp namespaces

Fixed all errors when we remove
`SDBUSPP_REMOVE_DEPRECATED_NAMESPACE` in sdbusplus.

Change-Id: I5607585b2709faa7aee347d26e458ef769ca1626
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/globalhandler.cpp b/globalhandler.cpp
index 8161988..992bdd8 100644
--- a/globalhandler.cpp
+++ b/globalhandler.cpp
@@ -15,7 +15,7 @@
 static constexpr auto match = "bmc0";
 
 using namespace phosphor::logging;
-using BMC = sdbusplus::xyz::openbmc_project::State::server::BMC;
+using BMC = sdbusplus::server::xyz::openbmc_project::state::BMC;
 
 void register_netfn_global_functions() __attribute__((constructor));