Add support of mcelog service

Change-Id: I32c83d63e7f359704ab6cc77dec07a1617880fbb
Prod-Related: PROD-20137
diff --git a/README.rst b/README.rst
index 5b7c72a..216755b 100644
--- a/README.rst
+++ b/README.rst
@@ -918,6 +918,18 @@
           logpath: "/var/log/atop"
           outfile: "/var/log/atop/daily.log"
 
+Linux with mcelog service:
+
+.. code-block:: yaml
+
+    linux:
+      system:
+        mcelog:
+          enabled: true
+          logging:
+            syslog: true
+            syslog_error: true
+
 RHEL / CentOS
 ^^^^^^^^^^^^^