CHROMIUM: Add config store support

CHROMIUM: Add config store support

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/232584
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/v4l2-ctrls.c
	include/media/v4l2-ctrls.h

[rebase44(groeck): Resolved conflicts]
Signed-off-by: Guenter Roeck <groeck@chromium.org>
Conflicts:
	drivers/media/v4l2-core/v4l2-ctrls.c

Change-Id: I0b2e66f3331cab91d209868f5d5f67f795a0e72c
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>