scsi: aic7xxx: Fix a function name in comments

Use dma_alloc_coherent() instead of pci_alloc_consistent().

Link: https://lore.kernel.org/r/20210925132931.95-1-caihuoqing@baidu.com


Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>