libceph: make con->state an int

unsigned long is a leftover from when con->state used to be a set of
bits managed with set_bit(), clear_bit(), etc.  Save a bit of memory.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

include/linux/ceph/messenger.h

@@ -257,13 +257,13 @@ struct ceph_connection {
 
 	struct ceph_messenger *msgr;
 
+	int state;
 	atomic_t sock_state;
 	struct socket *sock;
 	struct ceph_entity_addr peer_addr; /* peer address */
 	struct ceph_entity_addr peer_addr_for_me;
 
 	unsigned long flags;
-	unsigned long state;
 	const char *error_msg;  /* error message, if any */
 
 	struct ceph_entity_name peer_name; /* peer name */