meta-{ibm, openpower}: minor override syntax fixes

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Iadecbc8418d901f82fcc741d3e88d2d202fe96fe
diff --git a/meta-ibm/recipes-phosphor/logging/ibm-logging_git.bb b/meta-ibm/recipes-phosphor/logging/ibm-logging_git.bb
index d2efcda..8d6e640 100644
--- a/meta-ibm/recipes-phosphor/logging/ibm-logging_git.bb
+++ b/meta-ibm/recipes-phosphor/logging/ibm-logging_git.bb
@@ -35,7 +35,7 @@
 PACKAGECONFIG:mihawk = "policy-interface"
 
 SERVICE = "com.ibm.Logging.service"
-DBUS_SERVICE_${PN} += "${SERVICE}"
+DBUS_SERVICE:${PN} += "${SERVICE}"
 
 #The link is so that this service will restart if phosphor-logging restarts.
 #The BindsTo in the service will not do the restart, it will only do the