net: dsa: mv88e6xxx: use setup_timer to simplify the code

Use setup_timer function instead of initializing timer with the function
and data fields.
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/chip.c

@@ -639,9 +639,8 @@ static void mv88e6xxx_ppu_state_init(struct mv88e6xxx_chip *chip)
 {
 	mutex_init(&chip->ppu_mutex);
 	INIT_WORK(&chip->ppu_work, mv88e6xxx_ppu_reenable_work);
-	init_timer(&chip->ppu_timer);
-	chip->ppu_timer.data = (unsigned long)chip;
-	chip->ppu_timer.function = mv88e6xxx_ppu_reenable_timer;
+	setup_timer(&chip->ppu_timer, mv88e6xxx_ppu_reenable_timer,
+		    (unsigned long)chip);
 }
 
 static void mv88e6xxx_ppu_state_destroy(struct mv88e6xxx_chip *chip)