Add Advanced Encryption Standard (AES) in Galois/Counter Mode (GCM)
as an IPsec Encapsulating Security Payload (ESP) mechanism
to provide confidentiality and data origin authentication.
Signed-off-by: NTudor Ambarus <tudor.ambarus@freescale.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>