crypto: x86/serpent-sse2 - convert to skcipher interface

Convert the SSE2 implementation 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>

crypto/Kconfig

@@ -1422,11 +1422,10 @@ config CRYPTO_SERPENT
 config CRYPTO_SERPENT_SSE2_X86_64
 	tristate "Serpent cipher algorithm (x86_64/SSE2)"
 	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
 	help
 	  Serpent cipher algorithm, by Anderson, Biham & Knudsen.
 
@@ -1442,11 +1441,10 @@ config CRYPTO_SERPENT_SSE2_X86_64
 config CRYPTO_SERPENT_SSE2_586
 	tristate "Serpent cipher algorithm (i586/SSE2)"
 	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
 	help
 	  Serpent cipher algorithm, by Anderson, Biham & Knudsen.