Input: cyttsp4 - use swap() in cyttsp4_get_touch()

Use kernel.h macro definition.

Thanks to Julia Lawall for Coccinelle scripting support.
Signed-off-by: NFabian Frederick <fabf@skynet.be>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/cyttsp4_core.c

@@ -775,7 +775,6 @@ static void cyttsp4_get_touch(struct cyttsp4_mt_data *md,
 	struct device *dev = &md->input->dev;
 	struct cyttsp4_sysinfo *si = md->si;
 	enum cyttsp4_tch_abs abs;
-	int tmp;
 	bool flipped;
 
 	for (abs = CY_TCH_X; abs < CY_TCH_NUM_ABS; abs++) {
@@ -790,9 +789,7 @@ static void cyttsp4_get_touch(struct cyttsp4_mt_data *md,
 	}
 
 	if (md->pdata->flags & CY_FLAG_FLIP) {
-		tmp = touch->abs[CY_TCH_X];
-		touch->abs[CY_TCH_X] = touch->abs[CY_TCH_Y];
-		touch->abs[CY_TCH_Y] = tmp;
+		swap(touch->abs[CY_TCH_X], touch->abs[CY_TCH_Y]);
 		flipped = true;
 	} else
 		flipped = false;