drbd: Use setup_timer() instead of init_timer() to simplify the code.

	device->unplug_work.cb  = w_send_write_hint;

	device->bm_io_work.w.cb = w_bitmap_io;

	init_timer(&device->resync_timer);

	init_timer(&device->md_sync_timer);

	init_timer(&device->start_resync_timer);

	init_timer(&device->request_timer);

	device->resync_timer.function = resync_timer_fn;

	device->resync_timer.data = (unsigned long) device;

	device->md_sync_timer.function = md_sync_timer_fn;

	device->md_sync_timer.data = (unsigned long) device;

	device->start_resync_timer.function = start_resync_timer_fn;

	device->start_resync_timer.data = (unsigned long) device;

	device->request_timer.function = request_timer_fn;

	device->request_timer.data = (unsigned long) device;

	setup_timer(&device->resync_timer, resync_timer_fn,

			(unsigned long)device);

	setup_timer(&device->md_sync_timer, md_sync_timer_fn,

			(unsigned long)device);

	setup_timer(&device->start_resync_timer, start_resync_timer_fn,

			(unsigned long)device);

	setup_timer(&device->request_timer, request_timer_fn,

			(unsigned long)device);

	init_waitqueue_head(&device->misc_wait);

	init_waitqueue_head(&device->state_wait);