blk_mq_pci_map_queues maps all queues but right after this, we
overwrite these mappings by calling blk_mq_map_queues. Just use one
helper but not both.
Fixes: 42f22fe36d51 ("scsi: pm8001: Expose hardware queues for pm80xx")
Signed-off-by: Daniel Wagner<dwagner@xxxxxxx>