crypto: algapi - Fix build problem with NET disabled

The report functions use NLA_PUT so we need to ensure that NET
is enabled.

Reported-by: Luis Henriques <henrix@camandro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/ahash.c b/crypto/ahash.c
index a3e6ef9..ac93c99 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -399,6 +399,7 @@
 	return sizeof(struct crypto_shash *);
 }
 
+#ifdef CONFIG_NET
 static int crypto_ahash_report(struct sk_buff *skb, struct crypto_alg *alg)
 {
 	struct crypto_report_hash rhash;
@@ -416,6 +417,12 @@
 nla_put_failure:
 	return -EMSGSIZE;
 }
+#else
+static int crypto_ahash_report(struct sk_buff *skb, struct crypto_alg *alg)
+{
+	return -ENOSYS;
+}
+#endif
 
 static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg)
 	__attribute__ ((unused));