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/softoff.cpp b/softoff/softoff.cpp
index 4a3166c..f76cd4f 100644
--- a/softoff/softoff.cpp
+++ b/softoff/softoff.cpp
@@ -81,7 +81,7 @@
         if (r < 0)
         {
             log<level::ERR>("Failure to start Host shutdown wait timer",
-                    entry("ERROR=%s", strerror(-r)));
+                    entry("ERRNO=0x%X", -r));
         }
         else
         {
@@ -120,7 +120,7 @@
         if (r < 0)
         {
             log<level::ERR>("Failure to STOP the timer",
-                    entry("ERROR=%s", strerror(-r)));
+                    entry("ERRNO=0x%X", -r));
         }
 
         // This marks the completion of soft power off sequence.