meta-phosphor: prep for new override syntax

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I588025b614416c43aa2d053765ab53bacf890cb5
diff --git a/meta-phosphor/recipes-core/base-files/base-files_%.bbappend b/meta-phosphor/recipes-core/base-files/base-files_%.bbappend
index 30e5623..3eef9d8 100644
--- a/meta-phosphor/recipes-core/base-files/base-files_%.bbappend
+++ b/meta-phosphor/recipes-core/base-files/base-files_%.bbappend
@@ -1,15 +1,15 @@
-FILESEXTRAPATHS_prepend_df-obmc-ubi-fs := "${THISDIR}/${PN}/df-ubi:"
-FILESEXTRAPATHS_prepend_df-phosphor-mmc := "${THISDIR}/${PN}/df-mmc:"
+FILESEXTRAPATHS:prepend:df-obmc-ubi-fs := "${THISDIR}/${PN}/df-ubi:"
+FILESEXTRAPATHS:prepend:df-phosphor-mmc := "${THISDIR}/${PN}/df-mmc:"
 
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
 
-RDEPENDS_${PN}_append_df-obmc-ubi-fs = " preinit-mounts"
+RDEPENDS:${PN}:append:df-obmc-ubi-fs = " preinit-mounts"
 
 SRC_URI += " \
     file://50-rp_filter.conf \
 "
 
-do_install_append() {
+do_install:append() {
     sed -i 's/\(\(passwd\|group\):\s*\).*/\1files systemd/' \
         "${D}${sysconfdir}/nsswitch.conf"