meta-fii: meta-kudo: Replace append directives with += in bios-update

Replace append directives with += in kudo-bios-update bb recipe

Signed-off-by: Ashwin Murali <ashwin.murali@fii-na.com>
Change-Id: I9ced6841b6f9d68d3697bb51be5e36186262b0ce
diff --git a/meta-fii/meta-kudo/recipes-kudo/kudo-fw-utility/kudo-bios-update.bb b/meta-fii/meta-kudo/recipes-kudo/kudo-fw-utility/kudo-bios-update.bb
index 9fb7d24..be715de 100644
--- a/meta-fii/meta-kudo/recipes-kudo/kudo-fw-utility/kudo-bios-update.bb
+++ b/meta-fii/meta-kudo/recipes-kudo/kudo-fw-utility/kudo-bios-update.bb
@@ -15,13 +15,13 @@
 
 FILES:${PN} += "${datadir}/phosphor-ipmi-flash/config-bios.json"
 
-SRC_URI:append:kudo = " \
+SRC_URI += " \
     file://phosphor-ipmi-flash-bios-update.service \
     file://config-bios.json \
     "
 
 SYSTEMD_PACKAGES = "${PN}"
-SYSTEMD_SERVICE:${PN}:append:kudo = " \
+SYSTEMD_SERVICE:${PN} += " \
     phosphor-ipmi-flash-bios-update.service \
     "