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-kernel/linux/linux-aspeed_%.bbappend b/meta-amd/meta-ethanolx/recipes-kernel/linux/linux-aspeed_%.bbappend
index 9f7f1b9..ec2f527 100644
--- a/meta-amd/meta-ethanolx/recipes-kernel/linux/linux-aspeed_%.bbappend
+++ b/meta-amd/meta-ethanolx/recipes-kernel/linux/linux-aspeed_%.bbappend
@@ -1,2 +1,2 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/linux-aspeed:"
+FILESEXTRAPATHS:prepend := "${THISDIR}/linux-aspeed:"
 SRC_URI += "file://ethanolx.cfg"