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

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

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

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

Note:
Need to revert the change to BBFILE_PATTERN and LAYERSERIES_COMPAT.

After cleanup
```
$ git grep "_[a-z0-9_/-]*[ :]" -- meta-quanta/meta-gsj/ | grep '.bb'
meta-quanta/meta-gsj/recipes-bsp/u-boot/u-boot-fw-utils-nuvoton_%.bbappend:do_install:append:gsj () {
meta-quanta/meta-gsj/recipes-google/ipmi/google-ipmi-sys_%.bbappend:do_install:append:gsj() {
meta-quanta/meta-gsj/recipes-gsj/detect-fan-fail/detect-fan-fail.bb:do_install:append:gsj() {
meta-quanta/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/quanta-nvme-powerctrl.bb:do_install () {
meta-quanta/meta-gsj/recipes-phosphor/fans/phosphor-pid-control_%.bbappend:do_install:append:gsj() {
meta-quanta/meta-gsj/recipes-quanta/network/mac-address_%.bbappend:do_install:append:gsj() {
```

Change-Id: I058371ed32214d665aaaf616a650c2efeaf5be66
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/meta-quanta/meta-gsj/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend b/meta-quanta/meta-gsj/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
index e2d7530..4363aa3 100644
--- a/meta-quanta/meta-gsj/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
+++ b/meta-quanta/meta-gsj/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
@@ -1,4 +1,4 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
 
 
 NAMES = " \
@@ -15,9 +15,9 @@
 ITEMS += "${@compose_list(d, 'ITEMSFMT', 'NAMES')}"
 
 ENVS = "obmc/hwmon/{0}"
-SYSTEMD_ENVIRONMENT_FILE_${PN}_append_gsj = " ${@compose_list(d, 'ENVS', 'ITEMS')}"
+SYSTEMD_ENVIRONMENT_FILE_${PN}:append:gsj = " ${@compose_list(d, 'ENVS', 'ITEMS')}"
 
 # Fan sensors
 FITEMS = "pwm-fan-controller@103000.conf"
 FENVS = "obmc/hwmon/ahb/apb/{0}"
-SYSTEMD_ENVIRONMENT_FILE_${PN}_append_gsj = " ${@compose_list(d, 'FENVS', 'FITEMS')}"
+SYSTEMD_ENVIRONMENT_FILE_${PN}:append:gsj = " ${@compose_list(d, 'FENVS', 'FITEMS')}"