This patch adds a few more test cases for the IP checksum algorithm to catch more possible corner cases (large data with more than 64K carries, unaligned data, checksum addition with offset, etc.). Change-Id: I39b4d3f1bb833894985649872329eec88a02a22c Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/80252 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Jakub Czapiga <czapiga@google.com>