brya: fix prochot feature in AC only
brya: fix prochot feature in AC only

In old version, we will return early in assert_prochot if no battery.
Since we need to test under AC only as well, so add one judgment to let
AC only work.

BUG=b:198689488, b:198722634
BRANCH=none
TEST=make -j BOARD=gimble

Signed-off-by: Scott Chao <8cefa9751fac9aaa897ba1213763a96ba8dbd20d@wistron.corp-partner.google.com>
Change-Id: I999bd9f8d4d55a8c0c2f43017c4235df2565e45d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3243848
Reviewed-by: caveh jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>
Commit-Queue: caveh jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>

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