[KERNEL] Improve defconfig and its usage
Add x86_64_seco_defconfig
file to compile the kernel for x86. Yocto
uses by default the yocto-kernel-cache
builder to compose the
defconfing dynamically. In linux-seco the will is not to use it to keep
the defconfig local, immune to upstream changes.
Remove yocto-kernel-cache
-related variables and files. Remove
virtio.scc
as it's already embedded in the defconfig.
Add support to initramfs to both booting after installing the OS into the board and live booting from removable media.
Signed-off-by: Nicola Sparnacci nicola.sparnacci@seco.com