Input: synaptics - fix wrong dimensions check

The commit 83ba9ea8a04b72dfee2515428c15e7414ba4fc61 ommitted the return
line for the old synaptics model accidentally. This resulted in a wrong
check, namely, the dimensions are checked for the old devices that don't
support the query properly.

This patch adds the return line back.

Signed-off-by: Takashi Iwai <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/mouse/synaptics.c

···
 	unsigned char max[3];
 
 	if (SYN_ID_MAJOR(priv->identity) < 4)
+		return 0;
 
 	if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, res) == 0) {
 		if (res[0] != 0 && (res[1] & 0x80) && res[2] != 0) {