ata: sata_dwc_460ex: remove 'check_status' argument

Remove the 'check_status' argument from sata_dwc_qc_complete() and
sata_dwc_dma_xfer_complete() as it has no functionality.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>