Input: elantech - fix debug dump of the current packet

The use of mixed psmouse_printk() and printk creates 2 lines in the log,
while the use of %*ph solves everything.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/mouse/elantech.c

@@ -222,12 +222,8 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
  */
 static void elantech_packet_dump(struct psmouse *psmouse)
 {
-	int	i;
-
-	psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [");
-	for (i = 0; i < psmouse->pktsize; i++)
-		printk("%s0x%02x ", i ? ", " : " ", psmouse->packet[i]);
-	printk("]\n");
+	psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [%*ph]\n",
+		       psmouse->pktsize, psmouse->packet);
 }
 
 /*