50-touchpad-cmt-spring.conf: tweak finger merge thresholds

The merged finger may cause cursor moves and cursor jumps when split. The new thresholds of the finger merge filter will help to get rid of the issues accordingly.

BUG=chromium:346719
TEST=spring1/merge_1..5 and no regression on others

Change-Id: I4b11e0ca0fbadfce02c36b0a09ac01f7c4c7ba04
Reviewed-on: https://chromium-review.googlesource.com/188465
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
Tested-by: Chung-yih Wang <cywang@chromium.org>
Commit-Queue: Chung-yih Wang <cywang@chromium.org>
1 file changed