This keeps the tradition DRM driver along with the OGA one. The probe
function skips the driver if the screen is non rotated to fall back to
the regular DRM driver. This is being upstreamed from the Lakka repo.
- Revert odroidgo changes to drm_ctx
- Introduce new drm_go2_ctx specifically for odroidgo2 (and libgo2)
- Add hw_scaling option to mitigate builtin gl scaling/filtering and to
use libgo2 and rga's hw scaling and bicubic filtering via librga. The
quality of the image is improved by this and should be a bit faster.
Credits to CrashOverride for the initial libgo2 port and
commit to RA. And to natinusala for the initial cleanup/commit in the original
drm_ctx driver. NOirBRight for finding this setting and testing.
