Add WARNING log in Restore Configuration IPMI cmd

BMC configurable items like user details will be lost on BMC reboot
after Restore Configuration IPMI cmd is called. Add a WARNING log
to track command executions.

Tested:
Verified the log added after executing Restore Configuration IPMI
command.

Signed-off-by: Arun P. Mohanan <arun.p.m@linux.intel.com>
Change-Id: Id7439d833487f645dce036815208264e57f6917d
diff --git a/src/oemcommands.cpp b/src/oemcommands.cpp
index dee6255..3ca7caa 100644
--- a/src/oemcommands.cpp
+++ b/src/oemcommands.cpp
@@ -2914,6 +2914,11 @@
                 return ipmi::responseUnspecifiedError();
             }
             restoreFile << value << "\n";
+
+            phosphor::logging::log<phosphor::logging::level::WARNING>(
+                "Restore to default will be performed on next BMC boot",
+                phosphor::logging::entry("ACTION=0x%0X", cmd));
+
             break;
         }
         default: