Move the hotplug related code from probe and resume into a workqueue.
This allows us to initialize the DP driver (and resume it) when there
is no monitor connected.
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Reviewed-by: NOlof Johansson <olofj@chromium.org>
Signed-off-by: NJingoo Han <jg1.han@samsung.com>