Add the logic for wfd writeback interface. It already presents on other display interfaces. Change-Id: I389be77ec18041e260d0e71940586e86f1841ff8 Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org> Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org> (cherry picked from commit 3df55288659cfa826e9ad89cb38a8b722b2ae20f)