src: use namespace prefix osmo_wqueue*

Summary of changes:

s/struct write_queue/struct osmo_wqueue/g
s/write_queue_init/osmo_wqueue_init/g
s/write_queue_clear/osmo_wqueue_clear/g
s/write_queue_enqueue/osmo_wqueue_enqueue/g
s/write_queue_bfd_cb/osmo_wqueue_bfd_cb/g
diff --git a/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c b/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
index be2666d..9ac54da 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
@@ -478,7 +478,7 @@
 		return;
 	}
 
-	if (write_queue_enqueue(&bsc->nat->mgcp_cfg->gw_fd, output) != 0) {
+	if (osmo_wqueue_enqueue(&bsc->nat->mgcp_cfg->gw_fd, output) != 0) {
 		LOGP(DMGCP, LOGL_ERROR, "Failed to queue MGCP msg.\n");
 		msgb_free(output);
 	}
@@ -628,7 +628,7 @@
 
 	/* we do have a direct answer... e.g. AUEP */
 	if (resp) {
-		if (write_queue_enqueue(&nat->mgcp_cfg->gw_fd, resp) != 0) {
+		if (osmo_wqueue_enqueue(&nat->mgcp_cfg->gw_fd, resp) != 0) {
 			LOGP(DMGCP, LOGL_ERROR, "Failed to enqueue msg.\n");
 			msgb_free(resp);
 		}
@@ -698,7 +698,7 @@
 		return -1;
 	}
 
-	write_queue_init(&cfg->gw_fd, 10);
+	osmo_wqueue_init(&cfg->gw_fd, 10);
 	cfg->gw_fd.bfd.when = BSC_FD_READ;
 	cfg->gw_fd.bfd.data = nat;
 	cfg->gw_fd.read_cb = mgcp_do_read;
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat.c b/openbsc/src/osmo-bsc_nat/bsc_nat.c
index 0fb5843..f732488 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat.c
@@ -100,7 +100,7 @@
 	}
 
 
-	if (write_queue_enqueue(&con->write_queue, msg) != 0) {
+	if (osmo_wqueue_enqueue(&con->write_queue, msg) != 0) {
 		LOGP(DINP, LOGL_ERROR, "Failed to enqueue the write.\n");
 		msgb_free(msg);
 	}
@@ -877,7 +877,7 @@
 
 	osmo_fd_unregister(&connection->write_queue.bfd);
 	close(connection->write_queue.bfd.fd);
-	write_queue_clear(&connection->write_queue);
+	osmo_wqueue_clear(&connection->write_queue);
 	llist_del(&connection->list_entry);
 
 	talloc_free(connection);
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c b/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
index e796b2b..4f90cdf 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
@@ -124,7 +124,7 @@
 		return NULL;
 
 	con->nat = nat;
-	write_queue_init(&con->write_queue, 100);
+	osmo_wqueue_init(&con->write_queue, 100);
 	return con;
 }
 
@@ -335,16 +335,16 @@
 	return bsc_do_write(&bsc->write_queue, msg, proto);
 }
 
-int bsc_do_write(struct write_queue *queue, struct msgb *msg, int proto)
+int bsc_do_write(struct osmo_wqueue *queue, struct msgb *msg, int proto)
 {
 	/* prepend the header */
 	ipaccess_prepend_header(msg, proto);
 	return bsc_write_msg(queue, msg);
 }
 
-int bsc_write_msg(struct write_queue *queue, struct msgb *msg)
+int bsc_write_msg(struct osmo_wqueue *queue, struct msgb *msg)
 {
-	if (write_queue_enqueue(queue, msg) != 0) {
+	if (osmo_wqueue_enqueue(queue, msg) != 0) {
 		LOGP(DINP, LOGL_ERROR, "Failed to enqueue the write.\n");
 		msgb_free(msg);
 		return -1;
diff --git a/openbsc/src/osmo-bsc_nat/bsc_ussd.c b/openbsc/src/osmo-bsc_nat/bsc_ussd.c
index 910ef40..69cb7a4 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_ussd.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_ussd.c
@@ -60,7 +60,7 @@
 	close(con->queue.bfd.fd);
 	osmo_fd_unregister(&con->queue.bfd);
 	osmo_timer_del(&con->auth_timeout);
-	write_queue_clear(&con->queue);
+	osmo_wqueue_clear(&con->queue);
 	talloc_free(con);
 }
 
@@ -218,7 +218,7 @@
 		return -1;
 	}
 
-	write_queue_init(&conn->queue, 10);
+	osmo_wqueue_init(&conn->queue, 10);
 	conn->queue.bfd.data = conn;
 	conn->queue.bfd.fd = fd;
 	conn->queue.bfd.when = BSC_FD_READ;