[media] V4L: soc_mediabus: add a method to obtain the number of samples per pixel

Add a function to calculate the number of samples on the media-bus,
required to retrieve one pixel of a certain format.

Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2 files changed