MT#55283 move structs out of #ifdef scope

Fixes builds on kernels without BTREE

Reported in #2111

Change-Id: I988c5bf1119352c0bc212751f21c708477cb6df1

kernel-module/nft_rtpengine.c

@@ -605,6 +605,14 @@ struct re_timer_thread {
 	ktime_t scheduled_at;
 };
 
+static void free_packet_stream(struct re_play_stream_packets *stream);
+static void free_play_stream_packet(struct re_play_stream_packet *p);
+static void free_play_stream(struct re_play_stream *s);
+static void do_stop_stream(struct re_play_stream *stream);
+
+#endif
+
+
 struct re_ring_buffer {
 	void *head;
 	struct rtpengine_buf_slot *slots;
@@ -632,14 +640,6 @@ struct re_ring_buffer_pair {
 };
 
 
-static void free_packet_stream(struct re_play_stream_packets *stream);
-static void free_play_stream_packet(struct re_play_stream_packet *p);
-static void free_play_stream(struct re_play_stream *s);
-static void do_stop_stream(struct re_play_stream *stream);
-
-#endif
-
-
 static struct proc_dir_entry *my_proc_root;
 static struct proc_dir_entry *proc_list;
 static struct proc_dir_entry *proc_control;