* main-config: fix: avoid errors when BRANCH contains a dash; convert to underscore
* rockchip64_common: shellfmt, no changes
* rockchip64_common: move SERIALCON defaulting logic to a (verbose) hook for flexibility
* config: allow to build BRANCHes not listed in KERNEL_TARGET as long as the config is valid
- useful for `collabora` and other experimental kernels, we don't want to have to add it to each individual board's KERNEL_TARGES one by one
- but we don't want to allow typos in BRANCH to emit very strange unrelated errors
* extensions: mesa-oibaf extension by @monkaBlyat - mainline mesa PPA for Ubuntu
- does nothing on Debian
* extensions: (v3) amazingfated-rk35xx, now `rk-multimedia-amazingfate` - panfork-free
- simply skips if not on Jammy
- deploys Chromium + Widevine if desktop
* rockchip-rk3588: introduce `vendor-boogie-panthor` experimental BRANCH/kernel
- original: https://github.com/hbiyik/linux-rockchip.git (branch `rk-6.1-rkr1-panthor-v6`)
- I picked the commits on top of clean armbian/linux-rockchip `6.1-rkr1` as of 2024-04-01
- At https://github.com/rpardini/armbian-linux-rockchip-rk3588/tree/armbian-rk-6.1-rkr1-plus-boogie-panthor-v6
- Diff: https://github.com/armbian/linux-rockchip/compare/rk-6.1-rkr1...rpardini:armbian-linux-rockchip-rk3588:armbian-rk-6.1-rkr1-plus-boogie-panthor-v6
- rockchip-rk3588: introduce `boogie-bsp` BRANCH
- rockchip-rk3588: copy linux-rk35xx-vendor.config into linux-rk35xx-boogie-bsp.config
- rockchip-rk3588: update linux-rk35xx-boogie-bsp.config, no changes
- rockchip-rk3588: linux-rk35xx-boogie-bsp.config: `CONFIG_DRM_PANTHOR=m`
- rockchip-rk3588: linux-rk35xx-boogie-bsp.config: convert to defconfig
- rockchip-rk3588: rename to `BRANCH=vendor-boogie-panthor` for "clarity" (lol)
- rockchip-rk3588: vendor-boogie-panthor: force SERIALCON, full firmware (for blob needed for panthor) & mesa-oibaf extension
- rockchip-rk3588: vendor-boogie-panthor: enable amazingfated-rk35xx extension sans-panfork
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