Based on autoport and HP Pro 3500.
As part of this change renamed 3500 to 3x00 and added this as
it's variant.
It's an almost identical board to the 3500 but has a smaller flash.
Other differences between boards were identified by autoport.
They may or may not important but were included anyway.
Tested on HP Pro 3400, behaves exactly as 3500 described in the docs.
Changes were not significant enough to require retesting on 3500.
Change-Id: I833996f6eddcaac91fb0ad0cd95fcc2a99447387
Signed-off-by: Vesek <venda.straka@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85825
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
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