Turnip (Gen8) V21

rewrite to match the latest commits

Turnip with initial support for Adreno a8xx Series
(a810/a825/a829/a830/a840)

should also works on others GPUs

all upstream content from https://github.com/whitebelyash/mesa-tu8

Use TU_DEBUG deck_emu if you have problems starting any game

We recommend disabling DXVK_HUD if you see artifacts; Switch emulators may also have some glitches fixed by increasing (or decreasing) the resolution, Please note that this all is still experimental