crypto: x86/serpent-avx,avx2 - convert to skcipher interface

Convert the AVX and AVX2 implementations of Serpent from the
(deprecated) ablkcipher and blkcipher interfaces over to the skcipher
interface.  Note that this includes replacing the use of ablk_helper
with crypto_simd.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/x86/include/asm/crypto/serpent-avx.h

@@ -2,8 +2,11 @@
 #ifndef ASM_X86_SERPENT_AVX_H
 #define ASM_X86_SERPENT_AVX_H
 
-#include <linux/crypto.h>
+#include <crypto/b128ops.h>
 #include <crypto/serpent.h>
+#include <linux/types.h>
+
+struct crypto_skcipher;
 
 #define SERPENT_PARALLEL_BLOCKS 8
 
@@ -33,7 +36,7 @@ extern void __serpent_crypt_ctr(void *ctx, u128 *dst, const u128 *src,
 extern void serpent_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv);
 extern void serpent_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv);
 
-extern int xts_serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
+extern int xts_serpent_setkey(struct crypto_skcipher *tfm, const u8 *key,
 			      unsigned int keylen);
 
 #endif

crypto/Kconfig

@@ -1460,11 +1460,10 @@ config CRYPTO_SERPENT_SSE2_586
 config CRYPTO_SERPENT_AVX_X86_64
 	tristate "Serpent cipher algorithm (x86_64/AVX)"
 	depends on X86 && 64BIT
-	select CRYPTO_ALGAPI
-	select CRYPTO_CRYPTD
-	select CRYPTO_ABLK_HELPER
+	select CRYPTO_BLKCIPHER
 	select CRYPTO_GLUE_HELPER_X86
 	select CRYPTO_SERPENT
+	select CRYPTO_SIMD
 	select CRYPTO_XTS
 	help
 	  Serpent cipher algorithm, by Anderson, Biham & Knudsen.
@@ -1481,13 +1480,7 @@ config CRYPTO_SERPENT_AVX_X86_64
 config CRYPTO_SERPENT_AVX2_X86_64
 	tristate "Serpent cipher algorithm (x86_64/AVX2)"
 	depends on X86 && 64BIT
-	select CRYPTO_ALGAPI
-	select CRYPTO_CRYPTD
-	select CRYPTO_ABLK_HELPER
-	select CRYPTO_GLUE_HELPER_X86
-	select CRYPTO_SERPENT
 	select CRYPTO_SERPENT_AVX_X86_64
-	select CRYPTO_XTS
 	help
 	  Serpent cipher algorithm, by Anderson, Biham & Knudsen.