Input: synaptics - Lenovo Thinkpad T460p devices should use RMI

The tpouchpad/trackpoint on Lenovo Thinkpad T460p work with smbus/RMI.
Signed-off-by: NZhenjie Wang <zhenjie.wang@sjtu.edu.cn>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/mouse/synaptics.c

@@ -173,6 +173,7 @@ static const char * const smbus_pnp_ids[] = {
 	"LEN0046", /* X250 */
 	"LEN004a", /* W541 */
 	"LEN200f", /* T450s */
+	"LEN2018", /* T460p */
 	NULL
 };