Upgrade to fresh Linux release.
Enable more features in kernel from pmbootstrap kconfig check:
anbox, containers, iwd, nftables, zram.
Disable CONFIG_REGULATOR_DEBUG to reduce dmesg spam.
DRM and PANEL_SIMPLE are now built-in (DRM_MSM is still "m").
Switch to framebuffer from SIMPLEFB to tinydrm (SIMPLEDRM=y).
Switch APKBUILD to use "make zinstall" approach.
(Device packages might need small adjustments to initfs modules list.)
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