binaryPI: Replace CONFIG(ARCH_xx) test
Once we support building stages for different architectures,
such CONFIG(ARCH_xx) tests do not evaluate correctly anymore.
Not strictly required for binaryPI boards, but do this for
consistency.
Change-Id: Id0bbbfb6f695c4bb920bc57a1e9362a23884efb3
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42161
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>