Change 'nvenc_<codec>' to '<codec>_nvenc', which is consistent with other similar decoders and encoders (QSV, MMAL).
Express bitfields more simply. Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Partially based on the work of Timo Rothenpieler <timo@rothenpieler.org> Signed-off-by: Luca Barbato <lu_zero@gentoo.org>