Scanning problem for hidden SSIDs

[Holger Schurig]

> Ok, that's good.  So now we make sure we know the firmware version
> that the card has loaded, and then we start down the path of
> version-specific codepaths, which is fine.

I could check adapter->fwversion, but I don't need to. Simply because 
the v5.1 firmware also understands the OPRATES TLV at this stage. So I 
simply have to add that.

However, the more I look at scan.c, the more ugly it is. Maybe I 
re-write parts of it, so that it doesn't hurt the eyes as much and is 
more clearly structured.