scsi: bfa: Fix typo

Change 'chnage' to 'change'.

Link: https://lore.kernel.org/r/20210521092153.379-1-zuoqilin1@163.com


Signed-off-by: zuoqilin <zuoqilin@yulong.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>