improve new chassis power services

A few miscellaneous changes to improve descriptions and update where
these services are actually installed by the bitbake recipes.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Ic4471edcc589cd28f153a708d53f5a9b53fa2913
diff --git a/service_files/obmc-powered-off@.service b/service_files/obmc-powered-off@.service
index 434e0da..cd45cbd 100644
--- a/service_files/obmc-powered-off@.service
+++ b/service_files/obmc-powered-off@.service
@@ -1,5 +1,5 @@
 [Unit]
-Description=Power is off to chassis%i
+Description=Power is off to Chassis%i
 After=phosphor-wait-power-off@%i.service
 Requires=phosphor-wait-power-off@%i.service
 
@@ -14,6 +14,7 @@
 # services may conflict with this target to ensure they
 # are stopped at the appropriate time.
 ExecStart=/bin/systemctl start obmc-chassis-powered-off@%i.target
+SyslogIdentifier=phosphor-powered-off
 
 
 [Install]