Define Device Tree bindings for wfd and update the driver to match the
specification.
Change-Id: Ia204cf32aa1ccd5fd51999844dd73d740e90f0e2
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>
Signed-off-by: Neha Pandey <nehap@codeaurora.org>