crypto: api - Export crypto_alg_lookup instead of __crypto_alg_lookup

Since the only user of __crypto_alg_lookup is doing exactly what
crypto_alg_lookup does, we can now the latter in lieu of the former.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/internal.h b/crypto/internal.h
index 683fcb2..6d8d213 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -82,7 +82,7 @@
 }
 
 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
-struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
+struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
 
 int crypto_init_digest_ops(struct crypto_tfm *tfm);