doc-rst: autogenerate videodev2.h.rst file

This file comes from the uAPI definitions for V4L2, with is dynamic
and updated on almost every Kernel version. So, this file
needs to be auto-updated, as otherwise the documentation will
become obsolete too early.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
7 files changed