[SCSI] qla2xxx: Correct 'loop-down' determination logic in qla2x00_fw_ready().

As there is no point in failing the initialization process when
firmware informs the host software that it could not transition
beyond a CONFIG_WAIT nor WAIT_FOR_LOGIN state.  Previous logic
would mark such conditions as a general *failure* and subsequently
tear-down the scsi-host during initialization.

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