* tools: shellfmt: Beautify and add board configs to formatting list
* Format the whole code using `lib/tools/shellfmt.sh`
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Co-authored-by: Igor <igor@armbian.com>
The board config file was likely copy-pasted from a former `media` board and thus includes some stuff that is not needed, like the abandoned U-Boot repo which is basically an old fork from Raxda's vendor U-Boot.
- Switch to default rk3588 vendor U-Boot (using a generic rk3588 defconfig)
- Cleanup board config file
