Reducing IPMI logging footprint

-host-ipmid is very noisy in terms of journal logging. A small step
towards cleaning that up.
-Also converted printfs to phosphor-logging.

Partially Resolves openbmc/openbmc#2507

Change-Id: I749c19c18d1cabf6f0216830c8cb0a08ee43d6de
Signed-off-by: Aditya Saripalli <aditya0124@gmail.com>
Signed-off-by: Nagaraju Goruganti <ngorugan@in.ibm.com>
diff --git a/softoff/mainapp.cpp b/softoff/mainapp.cpp
index c6c1858..3a47cc4 100644
--- a/softoff/mainapp.cpp
+++ b/softoff/mainapp.cpp
@@ -41,7 +41,7 @@
     if (r < 0)
     {
         log<level::ERR>("Failure to create sd_event handler",
-                entry("ERROR=%s", strerror(-r)));
+                entry("ERRNO=0x%X", -r));
         return -1;
     }
 
@@ -65,7 +65,7 @@
         if (r < 0)
         {
             log<level::ERR>("Failure in processing request",
-                    entry("ERROR=%s", strerror(-r)));
+                    entry("ERRNO=0x%X", -r));
             return -1;
         }
     }