drm/imx: fixes, dma-fence annotation, and color encoding/range plane properties

- Annotate dma-fence critical section in atomic_commit_tail
- Fix PRG modifiers after drmm resource conversion to regain tiled
  scanout capability
- Add 8 pixel alignment fix to support 1366x768 resolution
- Stop advertising YUV formats on planes that don't support them
- Add COLOR_ENCODING and COLOR_RANGE plane properties on planes
  that support them
- Remove unnecessarily exported symbols
-----BEGIN PGP SIGNATURE-----

iI0EABYIADUWIQRRO6F6WdpH1R0vGibVhaclGDdiwAUCYJvSthcccC56YWJlbEBw
ZW5ndXRyb25peC5kZQAKCRDVhaclGDdiwKgPAQCUKFC/+Wthx0s28d+35scZKagA
J996vM8eZ4EEEoEl2AEA/k5Y7KkYdkhqJSKQZw6Gs3056JVNlypR85oRaI6yiwM=
=KUrk
-----END PGP SIGNATURE-----