Input: ads7846 - report 0 pressure value along with pen up event

X touchscreen drivers that don't interpret the designated pen up message
assume a pen up event from a pressure value 0. For these we generate a
pressure 0 message along with the pen up message.

Signed-off-by: Imre Deak <[e-mail]>
Acked-by: Juha Yrjola <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/touchscreen/ads7846.c

···
 	if (Rt) {
 		input_report_abs(input_dev, ABS_X, x);
 		input_report_abs(input_dev, ABS_Y, y);
-		input_report_abs(input_dev, ABS_PRESSURE, Rt);
 		sync = 1;
 	}
-	if (sync)
+
+	if (sync) {
+		input_report_abs(input_dev, ABS_PRESSURE, Rt);
 		input_sync(input_dev);
+	}
 
 #ifdef	VERBOSE
 	if (Rt || ts->pendown)