hevc: disable checksum SEI computation and add a private decoder flag to enable it
hevc: move SEI related functions in hevc_sei.c
hevc: add FPA SEI parsing
h264: Allow discarding the cropping information from SPS

Some 3D systems overload the meaning of the field for other purposes.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
(cherry picked from commit a84fb6e06f7f13e61b5dad0224fa392ebe65e294)
hevc: allow ignoring conformance window information
Merge remote-tracking branch 'kodabb/hevc' into hevc