[SCSI] qla2xxx: Verify the RISC is not in ROM code if firmware-load is disabled.

Add an additional check to verify that the current executing
firmware is in fact non-ROM code.  The non-ROM Get-ID mailbox
command is used for verification.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>