tests/: Add spi25.c unit tests

BUG=b:157280555
BRANCH=none
TEST=builds

Change-Id: I47112952835ce2c4c773a9d90379ff8ceefaaf9a
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/41645
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
4 files changed