CHROMIUM: Input: cyapa - fix "no return statement..."

CHROMIUM: Input: cyapa - fix "no return statement..."

cyapa_start_runtime() doesn't return anything, so make it return void.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
BUG=chromium-os:32389
TEST=builds without this warning:
  cyapa.c: In function 'cyapa_start_runtime':
  cyapa.c:1771:1: warning: no return statement in function returning non-void [-Wreturn-type]

Change-Id: I56ca2c62fb15c0a0e98b6277f8d3721c457eb9a5
Reviewed-on: https://gerrit.chromium.org/gerrit/26802
Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Tested-by: Daniel Kurtz <djkurtz@chromium.org>
Commit-Ready: Daniel Kurtz <djkurtz@chromium.org>