r8169: simplify rtl_task

static void rtl_task(struct work_struct *work)

{

	static const struct {

		int bitnr;

		void (*action)(struct rtl8169_private *);

	} rtl_work[] = {

		{ RTL_FLAG_TASK_RESET_PENDING,	rtl_reset_work },

	};

	struct rtl8169_private *tp =

		container_of(work, struct rtl8169_private, wk.work);

	struct net_device *dev = tp->dev;

	int i;

	rtl_lock_work(tp);

	if (!netif_running(dev) ||

	if (!netif_running(tp->dev) ||

	    !test_bit(RTL_FLAG_TASK_ENABLED, tp->wk.flags))

		goto out_unlock;

	for (i = 0; i < ARRAY_SIZE(rtl_work); i++) {

		bool pending;

		pending = test_and_clear_bit(rtl_work[i].bitnr, tp->wk.flags);

		if (pending)

			rtl_work[i].action(tp);

	}

	if (test_and_clear_bit(RTL_FLAG_TASK_RESET_PENDING, tp->wk.flags))

		rtl_reset_work(tp);

out_unlock:

	rtl_unlock_work(tp);

}