meta-yadro: Yocto override syntax change

Convert with convert-overrides.py
Sync local.conf.sample with:
- poky/meta-poky/conf/local.conf.sample
- meta-facebook/meta-tiogapass/conf/local.conf.sample
Additional manual changes (not found by convert-overrides.py) in
- meta-yadro/meta-nicole/recipes-kernel/linux/linux-aspeed_%.bbappend
- meta-yadro/meta-nicole/recipes-phosphor/images/obmc-phosphor-image.bbappend
- meta-yadro/meta-nicole/recipes-phosphor/settings/phosphor-settings-manager_%.bbappend

Tested: image compiles.

Signed-off-by: Andrei Kartashev <a.kartashev@yadro.com>
Change-Id: I959669bad43ce09c0817b2a002e6db546fb98f7f
diff --git a/meta-yadro/recipes-phosphor/cli/obmc-yadro-fwupdate_git.bb b/meta-yadro/recipes-phosphor/cli/obmc-yadro-fwupdate_git.bb
index dd7f397..95eef8f 100644
--- a/meta-yadro/recipes-phosphor/cli/obmc-yadro-fwupdate_git.bb
+++ b/meta-yadro/recipes-phosphor/cli/obmc-yadro-fwupdate_git.bb
@@ -19,7 +19,7 @@
 PACKAGECONFIG[openpower-support] = "-Dopenpower-support=true,-Dopenpower-support=false"
 
 PACKAGECONFIG ??= " obmc-phosphor-image reboot-guard-support "
-PACKAGECONFIG_append_df-openpower = "openpower-support"
+PACKAGECONFIG:append_df-openpower = "openpower-support"
 
 SRC_URI = "git://github.com/YADRO-KNS/obmc-yadro-fwupdate"
 SRCREV = "0e3c0714f344a2f7f289c851434955360e6f075b"