raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

Taken from https://patchwork.linuxtv.org/patch/60728/
Changes (mainly documentation) have been requested.

HEVC has a scaling matrix concept. Add support for it.
Signed-off-by: NJernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>