meta-phosphor: prep for new override syntax

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I588025b614416c43aa2d053765ab53bacf890cb5
diff --git a/meta-phosphor/recipes-phosphor/certificate/phosphor-certificate-manager_git.bb b/meta-phosphor/recipes-phosphor/certificate/phosphor-certificate-manager_git.bb
index 5a5f1d4..30730a4 100644
--- a/meta-phosphor/recipes-phosphor/certificate/phosphor-certificate-manager_git.bb
+++ b/meta-phosphor/recipes-phosphor/certificate/phosphor-certificate-manager_git.bb
@@ -29,8 +29,8 @@
 EXTRA_OECONF += "--disable-tests"
 
 CERT_TMPL = "phosphor-certificate-manager@.service"
-SYSTEMD_SERVICE_${PN} = "${CERT_TMPL}"
+SYSTEMD_SERVICE:${PN} = "${CERT_TMPL}"
 
 PACKAGECONFIG ??= ""
 PACKAGECONFIG[ibm-hypervisor-cert] = "--enable-ca-cert-extension,,"
-SYSTEMD_SERVICE_${PN} += "${@bb.utils.contains('PACKAGECONFIG', 'ibm-hypervisor-cert', 'bmc-vmi-ca-manager.service', '', d)}"
+SYSTEMD_SERVICE:${PN} += "${@bb.utils.contains('PACKAGECONFIG', 'ibm-hypervisor-cert', 'bmc-vmi-ca-manager.service', '', d)}"