meta-bytedance: Cleanup for Yocto override syntax change

 convert-overrides.py meta-bytedance
 git grep -l _g220a -- meta-bytedance | grep ".bb" | \
     xargs sed -i 's/_g220a/:g220a/'
 git grep -l _u-boot -- meta-bytedance | xargs sed -i \
     's/_u-boot/:u-boot/'

Tested:

    $ git grep "_[a-z0-9_/-]*[ :]" -- meta-bytedance | grep ".bb"
    meta-bytedance/meta-g220a/recipes-phosphor/chassis/x86-power-control_%.bbappend:do_install:append() {
    meta-bytedance/meta-g220a/recipes-phosphor/configuration/entity-manager_%.bbappend:do_install:append() {
    meta-bytedance/meta-g220a/recipes-phosphor/console/obmc-console_%.bbappend:do_install:append() {
    meta-bytedance/meta-g220a/recipes-phosphor/ipmi/phosphor-ipmi-ipmb_%.bbappend:do_install:append(){
    meta-bytedance/meta-g220a/recipes-phosphor/ipmi/phosphor-ipmi-kcs_%.bbappend:do_install:append() {
    meta-bytedance/recipes-core/systemd/systemd-conf_%.bbappend:do_install:append() {
    meta-bytedance/recipes-core/systemd/systemd_%.bbappend:do_install:append () {

Signed-off-by: Lei YU <yulei.sh@bytedance.com>
Change-Id: I26fb4c52012ee407ceb26c5a4120bf7b0b7a165a
diff --git a/meta-bytedance/meta-g220a/recipes-phosphor/images/obmc-phosphor-image.bbappend b/meta-bytedance/meta-g220a/recipes-phosphor/images/obmc-phosphor-image.bbappend
index 3059e80..6369a83 100644
--- a/meta-bytedance/meta-g220a/recipes-phosphor/images/obmc-phosphor-image.bbappend
+++ b/meta-bytedance/meta-g220a/recipes-phosphor/images/obmc-phosphor-image.bbappend
@@ -1,4 +1,4 @@
-OBMC_IMAGE_EXTRA_INSTALL_append_g220a = " \
+OBMC_IMAGE_EXTRA_INSTALL:append:g220a = " \
     webui-vue \
     me-time-sync \
     static-mac-addr \