[coreboot] flashrom: Fix error -EINVAL on mmap()

[Segher Boessenkool]

>> Don't calculate "flash_baseaddr" until the final value of "size"
>> is known, otherwise we end up trying to map a page right after
>> end of memory.
>>
>> Fixes #112.
>>
>> Signed-off-by: Segher Boessenkool <segher at kernel.crashing.org>
>>
> Acked-by: Stefan Reinauer <stepan at coresystems.de>

Committed, r3502.


Segher