Integrate seco-base/x86_features
Commit: seco-base@004f0e03
[DEFCONFIG] Code cleanup
Commit: seco-base@bf0073a3
[menuconfig][defconfig] Add support for x86 boards
Commit: seco-base@004f0e03
Commit: seco-base@bf0073a3
[menuconfig][defconfig] Add support for x86 boards