ps3disk: stop using q->prepare_flush_fn

REQ_FLUSH flag enables us to kill ps3disk_prepare_flush().

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
1 file changed