Report finger width

--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -702,6 +702,8 @@
    input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
    input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
    input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
+   if (hw->w >= 4)
+       input_report_abs(dev, ABS_TOOL_WIDTH, hw->w);
 }

 static void synaptics_report_mt_data(struct psmouse *psmouse,