The "Codec Interface" chapter is poorly named since codecs are just one
use-case of the Memory-to-Memory Interface. Rename it and clean up the
text a bit.
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: NTomasz Figa <tfiga@chromium.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>