elani2chid: Add an arm64 policy

Copy the arm policy and update the syscalls to remove ones that don't
exist and add ones that are needed.

BUG=None
TEST=Don't see touch_updater crash on trogdor64

Change-Id: I5f8cefa099c8c971b115098065e457f4d9c00f0f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/touch_updater/+/3325652
Tested-by: Stephen Boyd <swboyd@chromium.org>
Auto-Submit: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Harry Cutts <hcutts@chromium.org>
Commit-Queue: Harry Cutts <hcutts@chromium.org>
2 files changed