Update occ-control to use lg2 for all logging

Convert existing log<level>() trace statements to lg2::level()

Testing: Verified on Rainier - captured journal traces before and after
commit during boots, mode, pcap and ips changes.

Change-Id: I318fa7bf3902c641b0c28b09190db4b61d0a2fa9
Signed-off-by: Chris Cain <cjcain@us.ibm.com>
diff --git a/app.cpp b/app.cpp
index 18453bb..291d9cf 100644
--- a/app.cpp
+++ b/app.cpp
@@ -9,13 +9,9 @@
 #endif
 
 #include <org/open_power/OCC/Device/error.hpp>
-#include <phosphor-logging/elog-errors.hpp>
-#include <phosphor-logging/elog.hpp>
-#include <phosphor-logging/log.hpp>
+#include <phosphor-logging/lg2.hpp>
 #include <xyz/openbmc_project/Common/error.hpp>
 
-using namespace phosphor::logging;
-
 using namespace sdbusplus::org::open_power::OCC::Device::Error;
 using InternalFailure =
     sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
@@ -29,7 +25,7 @@
     auto r = sd_event_default(&event);
     if (r < 0)
     {
-        log<level::ERR>("Error creating a default sd_event handler");
+        lg2::error("Error creating a default sd_event handler");
         return r;
     }
     open_power::occ::EventPtr eventP{event};