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/include/openbsc/bsc_msc.h b/openbsc/include/openbsc/bsc_msc.h
index 88f0de4..9543002 100644
--- a/openbsc/include/openbsc/bsc_msc.h
+++ b/openbsc/include/openbsc/bsc_msc.h
@@ -35,7 +35,7 @@
 
 
 struct bsc_msc_connection {
-	struct write_queue write_queue;
+	struct osmo_wqueue write_queue;
 	int is_connected;
 	int is_authenticated;
 	int first_contact;
diff --git a/openbsc/include/openbsc/bsc_nat.h b/openbsc/include/openbsc/bsc_nat.h
index 73911bc..52b2ce5 100644
--- a/openbsc/include/openbsc/bsc_nat.h
+++ b/openbsc/include/openbsc/bsc_nat.h
@@ -76,7 +76,7 @@
 	int authenticated;
 
 	/* the fd we use to communicate */
-	struct write_queue write_queue;
+	struct osmo_wqueue write_queue;
 
 	/* the BSS associated */
 	struct bsc_config *cfg;
@@ -286,7 +286,7 @@
 };
 
 struct bsc_nat_ussd_con {
-	struct write_queue queue;
+	struct osmo_wqueue queue;
 	struct bsc_nat *nat;
 	int authorized;
 
@@ -361,8 +361,8 @@
 
 
 int bsc_write(struct bsc_connection *bsc, struct msgb *msg, int id);
-int bsc_do_write(struct write_queue *queue, struct msgb *msg, int id);
-int bsc_write_msg(struct write_queue *queue, struct msgb *msg);
+int bsc_do_write(struct osmo_wqueue *queue, struct msgb *msg, int id);
+int bsc_write_msg(struct osmo_wqueue *queue, struct msgb *msg);
 int bsc_write_cb(struct osmo_fd *bfd, struct msgb *msg);
 
 /* IMSI allow/deny handling */
diff --git a/openbsc/include/openbsc/mgcp.h b/openbsc/include/openbsc/mgcp.h
index 3d8e711..b9f8116 100644
--- a/openbsc/include/openbsc/mgcp.h
+++ b/openbsc/include/openbsc/mgcp.h
@@ -135,7 +135,7 @@
 	struct in_addr transcoder_in;
 	int transcoder_remote_base;
 
-	struct write_queue gw_fd;
+	struct osmo_wqueue gw_fd;
 
 	struct mgcp_port_range bts_ports;
 	struct mgcp_port_range net_ports;
diff --git a/openbsc/include/openbsc/osmo_bsc_rf.h b/openbsc/include/openbsc/osmo_bsc_rf.h
index dbbb3db..6db28cd 100644
--- a/openbsc/include/openbsc/osmo_bsc_rf.h
+++ b/openbsc/include/openbsc/osmo_bsc_rf.h
@@ -26,7 +26,7 @@
 };
 
 struct osmo_bsc_rf_conn {
-	struct write_queue queue;
+	struct osmo_wqueue queue;
 	struct osmo_bsc_rf *rf;
 };
 
diff --git a/openbsc/include/openbsc/osmo_msc_data.h b/openbsc/include/openbsc/osmo_msc_data.h
index 495c923..3212b36 100644
--- a/openbsc/include/openbsc/osmo_msc_data.h
+++ b/openbsc/include/openbsc/osmo_msc_data.h
@@ -59,7 +59,7 @@
 
 
 	/* mgcp agent */
-	struct write_queue mgcp_agent;
+	struct osmo_wqueue mgcp_agent;
 
 	/* rf ctl related bits */
 	char *mid_call_txt;