[PATCH] ahci: add HOST_CAP_NCQ constant

Add HOST_CAP_NCQ.
Signed-off-by: Tejun Heo <htejun@gmail.com>

drivers/scsi/ahci.c

@@ -93,6 +93,7 @@ enum {
 
 	/* HOST_CAP bits */
 	HOST_CAP_CLO		= (1 << 24), /* Command List Override support */
+	HOST_CAP_NCQ		= (1 << 30), /* Native Command Queueing */
 	HOST_CAP_64		= (1 << 31), /* PCI DAC (64-bit DMA) support */
 
 	/* registers for each SATA port */