SM5803: Only enable automatic fast charge with connected battery
SM5803: Only enable automatic fast charge with connected battery

Refrain from enabling automatic fast charge until battery is not
disconnected.  Automatic fast charge may cause the board to brown out
when no battery is connected and a heavy load or transient load happens.

BRANCH=Dedede
BUG=b:175074427
TEST=on lantis and drawcia, verify:
- battery can come out of cutoff on MB port
- board can boot with no battery on MB port

Signed-off-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>
Change-Id: I71b23b926bd319d4d9c87143395d9f33c173d442
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2601238
Tested-by: Tommy Chung <6120d22c63496c33c3bb182026a6e985639be44d@quanta.corp-partner.google.com>
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