input: msm_ts: Set input property bit to indicate direct input device

Prop bit is checked in userspace and must be set in driver in order
to be recognized as a direct input device (touchscreen).

Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>
(cherry picked from commit 3aaf03e26ac0c5422783e296c7ab05dd5d75f8a4)

Change-Id: Id7f0c28c6ab9ee40c83736a96515462819347d9c
Signed-off-by: Ramakrishna Prasad N <crpn@codeaurora.org>