[patch] Support MFI cards with option ROM disabled

[Andrew Boyer]

I noticed that the mfi driver fails to load if the card's option ROM is disabled in the BIOS.  (If you're not booting from it, it reduces the boot time a lot.)  The LSI supported driver includes support for this mode of operation but the driver in the FreeBSD tree doesn't.  The change is very simple.  See the attached patch.  Would someone please test it / clean it up / commit it?

It's been tested to work with the MegaRAID SAS 9261-8i.

Thanks,
 Andrew

P.S.  My apologies if there's any reason not to pull over changes from the supported driver...

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Andrew Boyer	aboyer at averesystems.com