Bluetooth: AMP: Remote AMP ctrl definitions

Create remote AMP controllers structure. It is used to keep information
about discovered remote AMP controllers by A2MP protocol.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
diff --git a/include/net/bluetooth/a2mp.h b/include/net/bluetooth/a2mp.h
index d547671..99c7389 100644
--- a/include/net/bluetooth/a2mp.h
+++ b/include/net/bluetooth/a2mp.h
@@ -33,6 +33,9 @@
 	__u8			handle;
 	enum amp_mgr_state	state;
 	unsigned long		flags;
+
+	struct list_head	amp_ctrls;
+	struct mutex		amp_ctrls_lock;
 };
 
 struct a2mp_cmd {