crypto: annotate ->poll() instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

include/crypto/if_alg.h

@@ -243,7 +243,7 @@ int af_alg_sendmsg(struct socket *sock, struct msghdr *msg, size_t size,
 ssize_t af_alg_sendpage(struct socket *sock, struct page *page,
 			int offset, size_t size, int flags);
 void af_alg_async_cb(struct crypto_async_request *_req, int err);
-unsigned int af_alg_poll(struct file *file, struct socket *sock,
+__poll_t af_alg_poll(struct file *file, struct socket *sock,
 			 poll_table *wait);
 struct af_alg_async_req *af_alg_alloc_areq(struct sock *sk,
 					   unsigned int areqlen);