CHROMIUM: v4l2-ctrls: add function to apply a configuration store.

CHROMIUM: v4l2-ctrls: add function to apply a configuration store.

Drivers need to be able to select a specific store. Add a new function that can
be used to apply a given store.

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/232585
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>

Change-Id: I3b80a31681765836a134812ebc56686324ca5194
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>