Bluetooth: Add connection role to bt_conn_info

This can be useful for both LE and BR/EDR connections so it sits
outside of those specific structs. The values are intentionally
matching the HCI values so for the HCI case we can just do a direct
assignment.

Change-Id: Id78d304bb61e5fd941f2c35351758c1eecc6ab6a
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

include/bluetooth/conn.h

@@ -127,10 +127,20 @@ struct bt_conn_br_info {
 };
 #endif
 
+/** Connection role (master or slave) */
+enum {
+	BT_CONN_ROLE_MASTER,
+	BT_CONN_ROLE_SLAVE,
+};
+
 /** Connection Info Structure */
 struct bt_conn_info {
 	/** Connection Type */
 	uint8_t type;
+
+	/** Connection Role */
+	uint8_t role;
+
 	union {
 		/** LE Connection specific Info */
 		struct bt_conn_le_info le;