Input: stmpe-ts - report BTN_TOUCH event

stmpe touchscreen supports BTN_TOUCH event but doesn't report it. Add
BTN_TOUCH reporting capability to the stmpe touchscreen driver.
Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@st.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/stmpe-ts.c

@@ -120,6 +120,7 @@ static void stmpe_work(struct work_struct *work)
 	__stmpe_reset_fifo(ts->stmpe);
 
 	input_report_abs(ts->idev, ABS_PRESSURE, 0);
+	input_report_key(ts->idev, BTN_TOUCH, 0);
 	input_sync(ts->idev);
 }
 
@@ -153,6 +154,7 @@ static irqreturn_t stmpe_ts_handler(int irq, void *data)
 	input_report_abs(ts->idev, ABS_X, x);
 	input_report_abs(ts->idev, ABS_Y, y);
 	input_report_abs(ts->idev, ABS_PRESSURE, z);
+	input_report_key(ts->idev, BTN_TOUCH, 1);
 	input_sync(ts->idev);
 
        /* flush the FIFO after we have read out our values. */