i2c: stm32l: Increase timeout from 10ms to 30ms

We found some cases where the battery can flip out and get confused
and hold the i2c lines.  Since the battery is actually smbus it will
give up after 25ms.  Increase our timeout to 30ms so that the next
trasaction will work OK.

TEST=Revert (1cd618e Wait for battery boot-up) and use a problematic
battery; see boot works OK.

Change-Id: Ife051220cbbbd49d7bc9c8607ba177cd9582fe58
Signed-off-by: Doug Anderson <dianders@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/197871
2 files changed