Integrate seco-base/x86_features
Commit: https://git.seco.com/yocto_ng/seco-base/-/commit/004f0e036a6a675815ece1c9b6d7c7b9803ffc89
[DEFCONFIG] Code cleanup
Commit: https://git.seco.com/yocto_ng/seco-base/-/commit/bf0073a3f3b2338572bb10f91214cdb2d5847390
[menuconfig][defconfig] Add support for x86 boards