Revert "Revert "Add 4MB version of HP 8200 SFF""

This reverts commit 20995450.

Wasn't this config's fault, the problem happens elsewhere too.

I'm going to revert build/boot/roms to an older version and backport
a few recent changes, to see if that fixes the problem. If it does,
then I know that the recent linker issues happen due to recent changes
in build/boot/roms

The linker errors typically appear in util/kconfig/ but can happen
elsewhere, seemingly random, which means I'm not handling distclean
properly. Something isn't getting cleaned properly.

Signed-off-by: Leah Rowe <leah@libreboot.org>