ACME Migration to kirkstone
in order to prepare to switch to kirkstone release, upgrade kernel from 4.14 to 5.15.
Regular Kirkstone is 5.15.54. BBB patchlist upgrades it to 5.15.55.
BBB patches come from: https://github.com/RobertCNelson/bb-kernel/tree/5.15.55-bone27
defconfig is generated and imported from kernel build using script: build_kernel.sh.
Baylibre acme specific patches applied or ported to kernel 5.15.
Signed-off-by: Jerome Neanne jneanne@baylibre.com