Spring: Account for dead zones left and right

There is a 60px padding left and right of the touchpad which never
report any values. This CL overrides the active area to account for
this in software.

BUG=chromium:356280
TEST=None

Change-Id: Id1ad67f254b034724090c5c739d0ded1cff00b40
Reviewed-on: https://chromium-review.googlesource.com/191473
Reviewed-by: Dennis Kempin <denniskempin@chromium.org>
Commit-Queue: Dennis Kempin <denniskempin@chromium.org>
Tested-by: Dennis Kempin <denniskempin@chromium.org>
1 file changed