crypto: algapi - remove crypto_alloc_instance()

Now that all "blkcipher" templates have been converted to "skcipher",
crypto_alloc_instance() is no longer used.  And it's not useful any
longer as it creates an old-style weakly typed instance rather than a
new-style strongly typed instance.  So remove it, and now that the name
is freed up rename crypto_alloc_instance2() to crypto_alloc_instance().

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index 4a5ad10..093869f 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -185,10 +185,8 @@ static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
 int crypto_attr_u32(struct rtattr *rta, u32 *num);
 int crypto_inst_setname(struct crypto_instance *inst, const char *name,
 			struct crypto_alg *alg);
-void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
-			     unsigned int head);
-struct crypto_instance *crypto_alloc_instance(const char *name,
-					      struct crypto_alg *alg);
+void *crypto_alloc_instance(const char *name, struct crypto_alg *alg,
+			    unsigned int head);
 
 void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
 int crypto_enqueue_request(struct crypto_queue *queue,