meta-facebook: prep for new override syntax

Ran `scripts/contrib/convert-overrides.py` from upstream Yocto and
fixed up a few by hand that were missed.

Tested: Built bletchley and tiogapass.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I0489ba007132901697e4ef1a29b03a3591b3ee3b
diff --git a/meta-facebook/recipes-fb/fb-powerctrl/fb-powerctrl.bb b/meta-facebook/recipes-fb/fb-powerctrl/fb-powerctrl.bb
index 1f476ad..ee72021 100644
--- a/meta-facebook/recipes-fb/fb-powerctrl/fb-powerctrl.bb
+++ b/meta-facebook/recipes-fb/fb-powerctrl/fb-powerctrl.bb
@@ -1,4 +1,4 @@
-FILESEXTRAPATHS_append := "${THISDIR}/files:"
+FILESEXTRAPATHS:append := "${THISDIR}/files:"
 
 inherit obmc-phosphor-systemd
 LICENSE = "Apache-2.0"
@@ -14,10 +14,10 @@
            file://LICENSE"
 
 DEPENDS = "systemd"
-RDEPENDS_${PN} = "bash"
+RDEPENDS:${PN} = "bash"
 
 SYSTEMD_PACKAGES = "${PN}"
-SYSTEMD_SERVICE_${PN} = "host-gpio.service host-poweron.service host-poweroff.service"
+SYSTEMD_SERVICE:${PN} = "host-gpio.service host-poweron.service host-poweroff.service"
 
 do_install() {
     install -d ${D}/usr/sbin