Revert "CHROMIUM: config: remove lock debug configs from arm64"

This reverts commit f187317cd7dfe4cdb74ebc90fe2e2323868182f3.

BUG=chrome-os-partner:57351
TEST=kevin boots in normal mode

Change-Id: I12252418aeaecb366bb4c32c7432a57e6db833e1
Reviewed-on: https://chromium-review.googlesource.com/384694
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Commit-Queue: Stephen Barber <smbarber@chromium.org>
Tested-by: Stephen Barber <smbarber@chromium.org>
(cherry picked from commit dd31943ad97d643caf055ec68e60a2c9262c6e98)
Reviewed-on: https://chromium-review.googlesource.com/384733