Fizz: Fill Sion brand code.

TEST=none
BUG=b:68227071

Change-Id: I75702e7ad8953de77b5e346370af8d513997860a
Reviewed-on: https://chromium-review.googlesource.com/765617
Commit-Ready: Cigi Wu <cigi.wu@quanta.corp-partner.google.com>
Tested-by: Cigi Wu <cigi.wu@quanta.corp-partner.google.com>
Reviewed-by: Kitty Liu <kitty.liu@intel.corp-partner.google.com>
Reviewed-by: YH Lin <yueherngl@chromium.org>
Reviewed-by: Yilun Lin <yllin@chromium.org>