meta-amd: fix compilation errors with latest Yocto

Make the following changes to fix compilation errors:
- add honister to the LAYERSERIES_COMPAT variable,
- increase CONF_VERSION to 2,
- use new bitbake override syntax

Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
Change-Id: I971f0f0f7110e0350994ced151ca429444885056
diff --git a/meta-amd/meta-ethanolx/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend b/meta-amd/meta-ethanolx/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend
index 66444b9..557d268 100644
--- a/meta-amd/meta-ethanolx/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend
+++ b/meta-amd/meta-ethanolx/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend
@@ -1 +1 @@
-FILESEXTRAPATHS_prepend_ethanolx := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS:prepend:ethanolx := "${THISDIR}/${PN}:"