BananaPi M2 support

[Sergey Suloev]

Hi,

I noticed that BananaPi M2 (A31 SoC) does not boot anymore on modern 
kernels. The problem arises somewhere between 5.7.19 - 5.8.18. I have 
saved boot logs for both versions https://pastebin.com/DTRZi8R7  and  
https://pastebin.com/PS2hq07A. Logs have been taken on clean/non-patched 
kernel with default config, u-boot v2020.10.

The kernel versions 5.7.x and below work well (I tried 5.5.19 and 
5.6.19). The versions 5.8.18 and above all fail (5.9 and 5.10).

Could you look at the problem or provide an advice about further 
investigation, please ?


Thank you