scsi: aic7xxx: Indent kconfig help text

Fix indentation of config option's help text by adding leading spaces.
Generally help text is indented by two more spaces beyond the leading tab
<\t> character.  It helps Kconfig parsers to read file without error.

Signed-off-by: Prasad Pandit <pjp@fedoraproject.org>
Link: https://lore.kernel.org/r/20240408050110.3679890-1-ppandit@redhat.com


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