ryu: Enable watchdog helper for P2 boards
ryu: Enable watchdog helper for P2 boards

We have several unused timer. Let's use TIM19 for watchdog helper.

BRANCH=None
BUG=chrome-os-partner:32660
TEST='waitms 3000' and see debug message.

Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/225254
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Alec Berg <alecaberg@chromium.org>
(cherry picked from commit 0dd653292c37f75e6b6c56f50af524fea7700b7b)
Signed-off-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>

Change-Id: I638a4de7d2729ffb10cb5cf2b3fb9c458dd588a5
Reviewed-on: https://chromium-review.googlesource.com/225754
Tested-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Reviewed-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Commit-Queue: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>

thehobn/ec,thehobn/ec,thehobn/ec,thehobn/ec