chipdrivers.h: Trivial resync with upstream The ich_hwseq_write_256() function prototype is not required in this header. BUG=none BRANCH=none TEST=none Signed-off-by: Edward O'Callaghan <quasisec@google.com> Change-Id: I9ae727978adee13d658959793a39134769cc87da Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/flashrom/+/2557969 Tested-by: Edward O'Callaghan <quasisec@chromium.org> Auto-Submit: Edward O'Callaghan <quasisec@chromium.org> Reviewed-by: Sam McNally <sammc@chromium.org> Commit-Queue: Edward O'Callaghan <quasisec@chromium.org>