crypto: atmel-aes - add support to GCM mode

This patch adds support to the GCM mode.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 3a3a1e7..3dd69df9 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -383,6 +383,7 @@
 	tristate "Support for Atmel AES hw accelerator"
 	depends on AT_XDMAC || AT_HDMAC || COMPILE_TEST
 	select CRYPTO_AES
+	select CRYPTO_AEAD
 	select CRYPTO_BLKCIPHER
 	help
 	  Some Atmel processors have AES hw accelerator.