nereid: add PD negotiate to high voltage support
nereid: add PD negotiate to high voltage support

With this change, EC can negotiate to 20v.

BUG=b:216581716
BRANCH=none
TEST=zmake configure -b nereid
TEST=verified on total phase

Signed-off-by: Scott Chao <8cefa9751fac9aaa897ba1213763a96ba8dbd20d@wistron.corp-partner.google.com>
Change-Id: Idd0c9b7e2a5dc04c4fb2c1217a6b72170f03732f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3419125
Reviewed-by: Andrew McRae <44ad1424cfc8411c96d9181798ca41ae55709dfb@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec