vell: Raise usbc ports i2c speed to 1Mhz
vell: Raise usbc ports i2c speed to 1Mhz

BUG=b:220196847
BRANCH=none
TEST=On Vell, Make sure usbc ports are charging.

Signed-off-by: Devin Lu <052fe648504800b810f29702ef4f3db83fad68bf@quantatw.com>
Change-Id: Iae94fecd3d2c99cecf177f0b52add7a884c80a88
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3577316
Reviewed-by: caveh jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>

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