crypto: aes-generic - drop key expansion routine in favor of library version

Drop aes-generic's version of crypto_aes_expand_key(), and switch to
the key expansion routine provided by the AES library. AES key expansion
is not performance critical, and it is better to have a single version
shared by all AES implementations.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index df6f0be..80ea118 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1072,6 +1072,7 @@
 config CRYPTO_AES
 	tristate "AES cipher algorithms"
 	select CRYPTO_ALGAPI
+	select CRYPTO_LIB_AES
 	help
 	  AES cipher algorithms (FIPS-197). AES uses the Rijndael
 	  algorithm.