Revert "crypto: algif_aead - Disable AEAD user-space for now"

This reverts commit f858c7bcca8c20761a20593439fe998b4b67e86b as
the algif_aead interface has been switched over to the new AEAD
interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -1532,6 +1532,15 @@ config CRYPTO_USER_API_RNG
 	  This option enables the user-spaces interface for random
 	  number generator algorithms.
 
+config CRYPTO_USER_API_AEAD
+	tristate "User-space interface for AEAD cipher algorithms"
+	depends on NET
+	select CRYPTO_AEAD
+	select CRYPTO_USER_API
+	help
+	  This option enables the user-spaces interface for AEAD
+	  cipher algorithms.
+
 config CRYPTO_HASH_INFO
 	bool