MFhead_mfi r233621

MFhead_mfi r233621
        Remove the magic mfi_array is 288 bytes and just use the
        sizeof the array since it is not 288 bytes.

        Change reporting of a "SYSTEM" disk to "JBOD" to match
        LSI MegaCli and firmware reporting.

        This means that fiutil command to "create jbod" is now a
        little confusing since a RAID per drive is not really what
        LSI defines JBOD to be.  This should be fixed in the future
        and support added to really create LSI JBOD and enable that
        feature on cards that support it.