odroid/common: bump kernel to tb-6.2.8

[paralin]

Updates Odroid XU4 kernel to tb-6.2.8

cc @danyer

git fetch
git checkout odroid-kernel-6.2
git submodule update
make br/linux-dirclean br/linux-headers-dirclean br/glibc-dirclean
rm -rf ./workspaces/default/extra_images
make compile