Add board config for MXQ TV box

[domin144]

Description

This change introduces a config for MXQ TV box based on S805 chip. This revives the s805_autoscript file, which is being sought for by the factory boot loader, making it possible to boot from SD card.

How Has This Been Tested?

I built an image with:

./compile.sh build BOARD=aml-s805-mxq BRANCH=edge BUILD_DESKTOP=yes BUILD_MINIMAL=no DESKTOP_APPGROUPS_SELECTED='browsers internet multimedia' DESKTOP_ENVIRONMENT=xfce DESKTOP_ENVIRONMENT_CONFIG_NAME=config_base KERNEL_CONFIGURE=no RELEASE=bookworm

I flashed an image on an SD card and booted the board. I was able to run xserver with display connected on integrated HDMI port and use mouse and keyboard connected to USB ports. Ethernet connection was working too.

Checklist:

Please delete options that are not relevant.

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

Notice

This is my first PR to this project, so any advice is appreciated. The board support and testing is not of high quality, but should not affect any other board and give good starting point for further work. Prior to these changes running armbian on the MXQ board requires non-trivial, manual adjustments to the image.