Upgrading Mender client 2.6 to 4.0

@TheYoctoJester I tried to boot kirkstone image with u-boot 2024.04 and found out that boot process stalls on the same point as described there: Trouble getting RPi4 to work - #7 by Vladimir. Then, I cherry-picked two commits from scarthgap branch of meta-mender-community repo:
fix: rpi: uboot, increase memory area for kernel loading · mendersoftware/meta-mender-community@1d3da07 · GitHub
fix: rpi 32bit, ignore address range checks in u-boot · mendersoftware/meta-mender-community@b930ff3 · GitHub
And I’m able to boot after these changes. Could I ask, please, should it be ported from scarthgap to kirkstone branch? Thanks.