CHROMIUM: videodev2.h: rename reserved2 to config_store in v4l2_buffer.

CHROMIUM: videodev2.h: rename reserved2 to config_store in v4l2_buffer.

When queuing buffers allow for passing the configuration store ID that
should be associated with this buffer. Use the 'reserved2' field for this.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
BUG=chrome-os-partner:33728
TEST=build

Signed-off-by: Pawel Osciak <posciak@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/232583
Trybot-Ready: Tomasz Figa <tfiga@chromium.org>
Tested-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-by: Wu-cheng Li <wuchengli@chromium.org>
Commit-Queue: Tomasz Figa <tfiga@chromium.org>

Conflicts:
	drivers/media/v4l2-core/videobuf2-core.c

[rebase44(groeck): fixed conflicts; structural changes to match v4.4]
Signed-off-by: Guenter Roeck <groeck@chromium.org>
Conflicts:
	drivers/media/v4l2-core/v4l2-compat-ioctl32.c

Change-Id: Ibb823e9369bec79645e09651b0dda006ed53ecc5
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>