Comment 1 for bug 1609204

This commit fixes this issue.

commit 332e081225fc2a657aa587c42943d5f5a7dae88b
Author: AceLan Kao <email address hidden>
Date: Fri Jul 1 09:51:49 2016 +0800

    intel-vbtn: new driver for Intel Virtual Button

    This driver supports power button event in Intel Virtual Button currently.
    New Dell XPS 13 requires this driver for the power button.

    This driver is copied/modified from intel-hid.c
    Most credit goes to the author of intel-hid.c,
    Alex Hung <email address hidden>

    Signed-off-by: AceLan Kao <email address hidden>
    Signed-off-by: Darren Hart <email address hidden>