Future Domain TMC-3260/AHA-2920A PCI card support.

Tested on Adaptec AHA-2920A PCI card.
Signed-off-by: NOndrej Zary <linux@zary.sk>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>