meta-openpower: prep for new override syntax

Change-Id: I5ca16c6fa7bc616bfa9bc41c4f86d32fd92b0287
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meta-openpower/recipes-phosphor/host/op-proc-control_git.bb b/meta-openpower/recipes-phosphor/host/op-proc-control_git.bb
index f0dbf9b..d21de54 100644
--- a/meta-openpower/recipes-phosphor/host/op-proc-control_git.bb
+++ b/meta-openpower/recipes-phosphor/host/op-proc-control_git.bb
@@ -28,9 +28,9 @@
 INSTANCE_FORMAT = "pcie-poweroff@{}.service"
 INSTANCES = "${@compose_list(d, 'INSTANCE_FORMAT', 'OBMC_CHASSIS_INSTANCES')}"
 SYSTEMD_PACKAGES = "${PN}"
-SYSTEMD_SERVICE_${PN} = "${TEMPLATE} ${INSTANCES}"
+SYSTEMD_SERVICE:${PN} = "${TEMPLATE} ${INSTANCES}"
 
-SYSTEMD_SERVICE_${PN} +=  " \
+SYSTEMD_SERVICE:${PN} +=  " \
                          xyz.openbmc_project.Control.Host.NMI.service \
                          op-stop-instructions@.service \
                          op-cfam-reset.service \