This patch add a helper to (un)register a array of templates. The
following patches will use this helper to simplify the code.
Signed-off-by: NXiongfeng Wang <xiongfeng.wang@linaro.org>
Reviewed-by: NEric Biggers <ebiggers@google.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>