Add the 6.6 kernel version support

[ingrid-huang]

Hi. Could you add the kernel 6.6 support in the ONIE code? Thank you.
FYI: https://www.kernel.org/pub/linux/kernel/v6.x/linux-6.6.tar.xz

[Yagami-Jiang]

@cbrune
Hi cbrune, I also want to use ONIE with 6.6 kernel version, can you help me?

[mshych]

Hi, This is an Open Source Project. You are welcome to check and send a pull request with this support.

[cpackham-atlnz]

I'm looking at a change that will make linux-6.12 available. I've got a local version working with kvm_x86_64 and a real x86_64 based board. The changes themselves aren't terribly hard it's just juggling the config files that's a bit fiddly. I hope to submit a PR soon but what I have is on top of some of my other PRs which are pending.