Input: synaptics - report clickpad property

With the new input property interface, it is possible to report the
special quirks of a device using ioctl/sysfs. This patch sets up the
device as a pointer, and reports the clickpad functionality via the
INPUT_PROP_BUTTONPAD property.
Acked-by: NChase Douglas <chase.douglas@canonical.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

drivers/input/mouse/synaptics.c

@@ -622,6 +622,8 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 {
 	int i;
 
+	__set_bit(INPUT_PROP_POINTER, dev->propbit);
+
 	__set_bit(EV_ABS, dev->evbit);
 	input_set_abs_params(dev, ABS_X,
 			     XMIN_NOMINAL, priv->x_max ?: XMAX_NOMINAL, 0, 0);
@@ -663,6 +665,7 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 	input_abs_set_res(dev, ABS_Y, priv->y_res);
 
 	if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
+		__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
 		/* Clickpads report only left button */
 		__clear_bit(BTN_RIGHT, dev->keybit);
 		__clear_bit(BTN_MIDDLE, dev->keybit);