SM5803: Clear Vbus source bits when setting charge mode
SM5803: Clear Vbus source bits when setting charge mode

When either inhibiting charging from happening or enabling charging, the
bits in FLOW_REG1 which cause Vbus to be sourced should be cleared.

BUG=None
BRANCH=None
TEST=make -j buildall

Signed-off-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>
Change-Id: I8713c50f7f6706882ecb9917bb329be22e0e1384
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2121199
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>

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