We usually put blk_mq_*() into include/linux/blk-mq.h, so
move this API into there.
Signed-off-by: NMing Lei <ming.lei@redhat.com>
Reviewed-by: NBart Van Assche <Bart.VanAssche@sandisk.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>