scsi: aacraid: clean up warning cast-function-type

scsi: aacraid: clean up warning cast-function-type

Make the aacraid driver -Wcast-function-type clean

Report by: https://github.com/KSPP/linux/issues/20

drivers/scsi/aacraid/aachba.c:813:23:
warning: cast between incompatible function types from
'int (*)(struct scsi_cmnd *)' to 'void (*)(struct scsi_cmnd *)'
[-Wcast-function-type]

Link: https://lore.kernel.org/r/20200309155319.12658-1-tranmanphong@gmail.com
Reviewed-by: Bart van Assche <bvanassche@acm.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>