[flashrom] [PATCH/FULL/SVN] Support for 4-bytes addressing SPI flash chips 32MB+ (256Mb+)

[dev at borisbaykov.com]

>> I wonder if this is helpful to may people. Thanks.
>
> I'm sure it is or will be sooner or later.
> We needed this feature for sure, although flashrom with ft2232h is
> painfully slow.
> But that's another task (probably we could use pyspiflash instead).

Flashrom is slow because read and erase operations are written very slow
now. They could be easily changed to become faster in times or in 10s of
times. Probably I'll do this later. This should be another patch.