battery: Update the default powerd's full factor value
battery: Update the default powerd's full factor value

Use the same default value as powerd, i.e. 97% instead of 94%.

The value comes from:
  src/platform2/power_manager/default_prefs/power_supply_full_factor

BRANCH=None
BUG=b:162604872
TEST=Checked EC showing the same Display percentage as the UI.

Change-Id: Ia8547915251ea80bc663b5f15435060acacf9021
Signed-off-by: Wai-Hong Tam <04b587fdf5845741a0c5a8b9cd59ca72d73ef8fc@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2335887
Reviewed-by: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>

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