Fixed behaviour of --noraid option

Option did not work corretly when more than 1 RAID type was present -
when 1 RAID configuration was found (SW in our case) on bus 1, and
second bus was not used (HW in our case) the scrit returned unknown
regardless of chosen option.

Also fixed the 'if ($opt_O)' condition - was false only in case of
ERRORS{OK}.