crypto: ablk_helper - move ablk_* functions from serpent-sse2/avx glue code to shared module

Move ablk-* functions to separate module to share common code between cipher
implementations.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 2c1c2df..8e9145c 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -174,6 +174,11 @@
 	help
 	  Quick & dirty crypto test module.
 
+config CRYPTO_ABLK_HELPER_X86
+	tristate
+	depends on X86
+	select CRYPTO_CRYPTD
+
 comment "Authenticated Encryption with Associated Data"
 
 config CRYPTO_CCM
@@ -786,6 +791,7 @@
 	depends on X86 && 64BIT
 	select CRYPTO_ALGAPI
 	select CRYPTO_CRYPTD
+	select CRYPTO_ABLK_HELPER_X86
 	select CRYPTO_SERPENT
 	select CRYPTO_LRW
 	select CRYPTO_XTS
@@ -806,6 +812,7 @@
 	depends on X86 && !64BIT
 	select CRYPTO_ALGAPI
 	select CRYPTO_CRYPTD
+	select CRYPTO_ABLK_HELPER_X86
 	select CRYPTO_SERPENT
 	select CRYPTO_LRW
 	select CRYPTO_XTS
@@ -826,6 +833,7 @@
 	depends on X86 && 64BIT
 	select CRYPTO_ALGAPI
 	select CRYPTO_CRYPTD
+	select CRYPTO_ABLK_HELPER_X86
 	select CRYPTO_SERPENT
 	select CRYPTO_LRW
 	select CRYPTO_XTS