meta-quanta: meta-gbs: Cleanup for Yocto override syntax change

Cleanup with
```
convert-overrides.py meta-quanta/meta-gbs

git grep "_[a-z0-9_/-]*[ :]" -- meta-quanta/meta-gbs

git grep -l _gbs -- meta-quanta/meta-gbs \
  | xargs sed -i 's/_gbs/:gbs/'
```

After cleanup
```
$ git grep "_[a-z0-9_/-]*[ :]" -- meta-quanta/meta-gbs/ | grep '.bb'
meta-quanta/meta-gbs/recipes-bsp/images/npcm7xx-igps-native_%.bbappend:addtask do_gbs_prepare_xmls after do_patch before do_install
meta-quanta/meta-gbs/recipes-gbs/gbs-sysinit/gbs-sysinit.bb:do_install () {
meta-quanta/meta-gbs/recipes-google/acpi-power-state/acpi-power-state-daemon_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/fans/phosphor-pid-control_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/gpio/phosphor-gpio-monitor_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/interfaces/bmcweb_%.bbappend:do_install:append:gbs(){
meta-quanta/meta-gbs/recipes-phosphor/inventory/phosphor-inventory-manager_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/ipmi/phosphor-ipmi-blobs-binarystore_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/leds/phosphor-led-manager_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/sensors/phosphor-nvme_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/sensors/phosphor-virtual-sensor_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-quanta/network/usb-network.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-x86/chassis/x86-power-control_%.bbappend:do_install:append:gbs() {
```

Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: If640ddd3c6f6084bb0a1d82e2d18fa2640d9d83e
diff --git a/meta-quanta/meta-gbs/recipes-phosphor/watchdog/phosphor-watchdog_%.bbappend b/meta-quanta/meta-gbs/recipes-phosphor/watchdog/phosphor-watchdog_%.bbappend
index d8b1aa9..23b063f 100644
--- a/meta-quanta/meta-gbs/recipes-phosphor/watchdog/phosphor-watchdog_%.bbappend
+++ b/meta-quanta/meta-gbs/recipes-phosphor/watchdog/phosphor-watchdog_%.bbappend
@@ -1,12 +1,12 @@
-FILESEXTRAPATHS_prepend_gbs := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS:prepend:gbs := "${THISDIR}/${PN}:"
 
-SYSTEMD_ENVIRONMENT_FILE_${PN}_append_gbs = " obmc/watchdog/host0"
+SYSTEMD_ENVIRONMENT_FILE_${PN}:append:gbs = " obmc/watchdog/host0"
 OBMC_HOST_WATCHDOG_INSTANCES_A = "host0"
 WATCHDOG_FMT_A = "phosphor-watchdog@{0}.service"
-SYSTEMD_OVERRIDE_${PN}_remove_gbs = "poweron.conf:phosphor-watchdog@poweron.service.d/poweron.conf"
-SYSTEMD_LINK_${PN}_remove_gbs = "${@compose_list(d, 'ENABLE_WATCHDOG_FMT', 'OBMC_HOST_INSTANCES')}"
-SYSTEMD_LINK_${PN}_remove_gbs = "${@compose_list(d, 'WATCHDOG_FMT', 'OBMC_HOST_WATCHDOG_INSTANCES', 'OBMC_HOST_INSTANCES')}"
-SYSTEMD_SERVICE_${PN}_gbs = " ${@compose_list(d, 'WATCHDOG_FMT_A', 'OBMC_HOST_WATCHDOG_INSTANCES_A')} \
+SYSTEMD_OVERRIDE_${PN}:remove:gbs = "poweron.conf:phosphor-watchdog@poweron.service.d/poweron.conf"
+SYSTEMD_LINK_${PN}:remove:gbs = "${@compose_list(d, 'ENABLE_WATCHDOG_FMT', 'OBMC_HOST_INSTANCES')}"
+SYSTEMD_LINK_${PN}:remove:gbs = "${@compose_list(d, 'WATCHDOG_FMT', 'OBMC_HOST_WATCHDOG_INSTANCES', 'OBMC_HOST_INSTANCES')}"
+SYSTEMD_SERVICE:${PN}:gbs = " ${@compose_list(d, 'WATCHDOG_FMT_A', 'OBMC_HOST_WATCHDOG_INSTANCES_A')} \
                               phosphor-host-watchdog-reset.service \
                               phosphor-host-watchdog-poweroff.service \
                               phosphor-host-watchdog-powercycle.service \