This brings DRM core from drm_subtree[1] project, including:
DRM Backends:
- Rockchip RK3399
- ARM Komeda (Morello Board)
- Allwinner
- Panfrost GPU driver
Bridges:
- Designware HDMI
- anx6345 RGB to eDP bridge
- TDA998x HDMI
This support does not require LinuxKPI and does not use td_lkpi_task in struct thread