crypto: serpent-sse2 - select LRW and XTS

serpent-sse2 uses functions from LRW and XTS modules, so selecting would appear
to be better option than using #ifdefs in serpent_sse2_glue.c to enable/disable
LRW and XTS features.

This also fixes build problem when serpent-sse2 would be build into kernel but
XTS/LRW are build as modules.
Signed-off-by: NJussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -770,6 +770,8 @@ config CRYPTO_SERPENT_SSE2_X86_64
 	select CRYPTO_ALGAPI
 	select CRYPTO_CRYPTD
 	select CRYPTO_SERPENT
+	select CRYPTO_LRW
+	select CRYPTO_XTS
 	help
 	  Serpent cipher algorithm, by Anderson, Biham & Knudsen.
 
@@ -788,6 +790,8 @@ config CRYPTO_SERPENT_SSE2_586
 	select CRYPTO_ALGAPI
 	select CRYPTO_CRYPTD
 	select CRYPTO_SERPENT
+	select CRYPTO_LRW
+	select CRYPTO_XTS
 	help
 	  Serpent cipher algorithm, by Anderson, Biham & Knudsen.