stm32: update USB version for BOS descriptors

Bump the USB version (aka bcdUSB) for BOS descriptors to 2.1 (rather
than 2.01) to be compatible with Chrome implementation.

The CL 664813 was intending to do this, but I screw up and only changed
it for chip/g and let chip/stm32 unchanged :
https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/664813

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

BRANCH=twinkie
BUG=none
TEST=manual, plug an updated Twinkie and see the WebUSB pop-up on
Chrome.

Change-Id: Ia81fa91b6d7790af6f6683c0da7ca1d794b4e4df
Reviewed-on: https://chromium-review.googlesource.com/789934
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
(cherry picked from commit c2bafec03c274fb6e3d4db7b0030f4ad4ab85aa7)
Reviewed-on: https://chromium-review.googlesource.com/790250
Reviewed-by: David Schneider <dnschneid@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
2 files changed