fatfs and io disk misc patches

[Andrew Lunn]

> >The same needs applying to packages/dev/disk/v85x. Could you provide a
> >patch please?
> > 
> >
> Here it is.

Thanks. Committed.

How easy would it be to split this driver up into a generic CF disk
driver and a hardware specific part for your target board? 

There was a post a couple of days ago of somebody porting this driver,
so it seems there could be demand for CF disk support.

        Thanks
                Andrew