ocpc: Do not report invalid charger if CHARGE_PORT_NONE
ocpc: Do not report invalid charger if CHARGE_PORT_NONE

Do not report an invalid charger if there is no charger.

BUG=b:215253447
TEST=zmake configure -b nivviks; flash and run
BRANCH=none

Signed-off-by: Andrew McRae <44ad1424cfc8411c96d9181798ca41ae55709dfb@google.com>
Change-Id: I23b1d7861065c32b438e43198c2fa1cc2a515f5b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3403358
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>
Commit-Queue: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>

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