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

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Iadecbc8418d901f82fcc741d3e88d2d202fe96fe
diff --git a/meta-openpower/recipes-phosphor/flash/openpower-software-manager_git.bb b/meta-openpower/recipes-phosphor/flash/openpower-software-manager_git.bb
index ee6f013..4fc437f 100644
--- a/meta-openpower/recipes-phosphor/flash/openpower-software-manager_git.bb
+++ b/meta-openpower/recipes-phosphor/flash/openpower-software-manager_git.bb
@@ -63,7 +63,7 @@
 
 SRCREV = "5dc5d6cc6796ef038c59e41297349a982c8dd296"
 
-DBUS_SERVICE_${PN} += "org.open_power.Software.Host.Updater.service"
+DBUS_SERVICE:${PN} += "org.open_power.Software.Host.Updater.service"
 
 SYSTEMD_SERVICE:${PN} += " \
         op-pnor-msl.service \