CHROMIUM: config: enable joystick support

CHROMIUM: config: enable joystick support

We want to be able to use USB joysticks with games, so enable the
driver by default in our builds.

BUG=None
TEST=build kernel, packages, and image for x86-alex; boot it up; plug in USB gamepad and see /dev/input/js0

Signed-off-by: Mike Frysinger <vapier@chromium.org>
Change-Id: I494672a08d307d7268f9d5f0b2e06e68c4dedc5a
Reviewed-on: https://gerrit.chromium.org/gerrit/14398
Reviewed-by: Olof Johansson <olofj@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>