Add new TVBox aml-c400-plus: Magicsee C400 Plus

[jomadeto]

Description

This PR adds support for the Magicsee C400 Plus

http://m.magicsees.com/m/prod_view.aspx?TypeId=66&Id=191&Fid=t3:66:3

Boot directly with moddified s905_autoscript and emmc_autocript without need of u-boot (cannot boot from emmc with u-boot)

Documentation summary for feature / change

With generic S9xx builds and with aml-c400-plus.dtb all working well from SD and USB but cannot boot from EMMC (start u-boot but not detect EMMC).

After a lot of test and error get working everything with SD, USB and EMMC without u-boot, only need correct s905_autoscript and emmc_autoscript. Also need few changes for use armbianEnv.txt instead extlinux.conf, and correct in root/install-aml.sh.

Maybe with this changes another old tvbox with s912 processor can boot from EMMC changing only dtb(read in forums that this problem is generic).

How Has This Been Tested?

• ./compile.sh build BOARD=aml-c400-plus BRANCH=current BUILD_DESKTOP=yes BUILD_MINIMAL=no DESKTOP_APPGROUPS_SELECTED='desktop_tools editors internet multimedia office programming' DESKTOP_ENVIRONMENT=xfce DESKTOP_ENVIRONMENT_CONFIG_NAME=config_base KERNEL_CONFIGURE=no RELEASE=noble

Checklist:

• 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

[igorpecovnik]

looks good, tvb - if it builds, its ok to merge.