mosys: remove version_id in platform_intf

No platforms are reporting platform version (board revision) by the
version_id inside platform_intf so we can now deprecate it.

BUG=None
TEST=emerge-$BOARD mosys (BOARD=kukui, elm, nyan)

Change-Id: I67cef9faba2a563dd2d784729a96450b99b55790
Reviewed-on: https://chromium-review.googlesource.com/1367207
Commit-Ready: Hsin-Yi Wang <hsinyi@chromium.org>
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
1 file changed