crypto: xts - drop gf128mul dependency

Since the gf128mul_x_ble function used by xts.c is now defined inline
in the header file, the XTS module no longer depends on gf128mul.
Therefore, the 'select CRYPTO_GF128MUL' line can be safely removed.
Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com>
Reviewd-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -374,7 +374,6 @@ config CRYPTO_XTS
 	tristate "XTS support"
 	select CRYPTO_BLKCIPHER
 	select CRYPTO_MANAGER
-	select CRYPTO_GF128MUL
 	select CRYPTO_ECB
 	help
 	  XTS: IEEE1619/D16 narrow block cipher use with aes-xts-plain,