ide: always ensure that blk_delay_queue() is called if we have pending IO

Just because we are not requeuing a request does not mean that
some aren't pending. So always issue a blk_delay_queue() if
either we are requeueing OR there's pending IO.

This fixes a boot problem for some IDE boxes.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>