These kernels must have NLS_ASCII set after bb6d7a05b, or else they
cannot mount the ESP as /boot and boot fails. This kconfig option will
be added to the pmb efi kconfig check so that this is caught in the
future pre-merge.
fixes 3909b1dbf and bb6d7a05b
[ci:skip-build] already built successfully in CI
This upgrades kernel to 6.6.22 backporting fixes for major performance
issues of Microsoft Surface RT.
This also re-generates config with "make grate_defconfig pmos.config"
and adds pmb:kconfigcheck-uefi for surface rt.
