Mecool BB2 and DTB file not in device_trees folder

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Linux Kernel FAQ and Discussion

The 4.9 vendor kernel current used by CoreELEC. CoreELEC currently uses the 4.9 vendor kernel maintained by Amlogic. This kernel has a vast assortment of extra features and drivers added to it by Amlogic to support their various SoC. (This is referred to as a vendor kernel because it is developed/released/maintained by the vendor for the sole purpose of supporting their product.) This is the only maintained kernel that has working support for the hardware decoder and all the other media feature…

9.2.8, project Amlogic is needed and working.