ata: libata: Introduce ata_ncq_supported()
Introduce the inline helper function ata_ncq_supported() to test if a device supports NCQ commands. The function ata_ncq_enabled() is also rewritten using this new helper function. Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
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