Key Improvement
- enable the mutiple driver selection logic and enable it for DRM.
- drm: Add iHD to driver_name_map
- Add missed slice parameter 'slice_data_num_emu_prevn_bytes'
- ensure that all meson files are part of the release tarball
- configure: use correct comparison operator
- trace: support VAConfigAttribMultipleFrame in trace
- remove incorrect field of VAConfigAttribValDecJPEG
- va/va_trace: Dump VP9 parameters for profile 1~3
- add multiple frame capability report
- add variable to indicate layer infromation
- trace: fix memory leak on closing the trace
- add prediction direction caps report
- Add comments for colour primaries and transfer characteristics in VAProcColorProperties