crypto: ghash,poly1305 - select CRYPTO_HASH where needed

The ghash and poly1305 hash implementations can be enabled when
CONFIG_CRYPTO_HASH is turned off, causing a link error:

crypto/built-in.o: In function `ghash_mod_init':
(.init.text+0xd0): undefined reference to `crypto_register_shash'
crypto/built-in.o: In function `ghash_mod_exit':
(.exit.text+0xb4): undefined reference to `crypto_unregister_shash'
crypto/built-in.o: In function `poly1305_mod_init':
(.init.text+0xb4): undefined reference to `crypto_register_shash'
crypto/built-in.o: In function `poly1305_mod_exit':
(.exit.text+0x98): undefined reference to `crypto_unregister_shash'

This adds an explicit 'select', like all other hashes have it.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -472,11 +472,13 @@ config CRYPTO_CRCT10DIF_PCLMUL
 config CRYPTO_GHASH
 	tristate "GHASH digest algorithm"
 	select CRYPTO_GF128MUL
+	select CRYPTO_HASH
 	help
 	  GHASH is message digest algorithm for GCM (Galois/Counter Mode).
 
 config CRYPTO_POLY1305
 	tristate "Poly1305 authenticator algorithm"
+	select CRYPTO_HASH
 	help
 	  Poly1305 authenticator algorithm, RFC7539.