disp: msm: sde: add a property to control display input touch event

Display input touch event is replaced with IOCTL in performance HAL
to early wake up DSI clock.
Add a property to enable/disable display input touch event for backward
compatibility.

Change-Id: Ib6b9123d726e79a2927b05d1ef77c343f01d0c5e
Signed-off-by: Lei Chen <chenlei@codeaurora.org>

msm/sde/sde_encoder.h

@@ -232,6 +232,7 @@ struct sde_encoder_virt {
 	u32 misr_frame_count;
 
 	bool idle_pc_enabled;
+	bool input_event_enabled;
 	struct mutex rc_lock;
 	enum sde_enc_rc_states rc_state;
 	struct kthread_delayed_work delayed_off_work;