Bluetooth: host: Refactor out BR/EDR from hci_core to br

Refactor out the BR/EDR handling from hci_core.c to its own source file
in br.c.
BR/EDR consists of inquiry and discovery roles in addition to
initialization. SSP is still kept separate.

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>

subsys/bluetooth/host/CMakeLists.txt

@@ -15,6 +15,7 @@ zephyr_library_sources_ifdef(CONFIG_BT_HOST_CCM         aes_ccm.c)
 
 zephyr_library_sources_ifdef(
   CONFIG_BT_BREDR
+  br.c
   keys_br.c
   l2cap_br.c
   sdp.c

subsys/bluetooth/host/br.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2017-2021 Nordic Semiconductor ASA
+ * Copyright (c) 2015-2016 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+int bt_br_init(void);
+
+void bt_br_discovery_reset(void);
+
+bool bt_br_update_sec_level(struct bt_conn *conn);

subsys/bluetooth/host/hci_core.h

@@ -395,3 +395,18 @@ void bt_hci_le_past_received(struct net_buf *buf);
 /* Adv HCI event handlers */
 void bt_hci_le_adv_set_terminated(struct net_buf *buf);
 void bt_hci_le_scan_req_received(struct net_buf *buf);
+
+/* BR/EDR HCI event handlers */
+void bt_hci_conn_req(struct net_buf *buf);
+void bt_hci_conn_complete(struct net_buf *buf);
+
+
+void bt_hci_inquiry_complete(struct net_buf *buf);
+void bt_hci_inquiry_result_with_rssi(struct net_buf *buf);
+void bt_hci_extended_inquiry_result(struct net_buf *buf);
+void bt_hci_remote_name_request_complete(struct net_buf *buf);
+
+void bt_hci_read_remote_features_complete(struct net_buf *buf);
+void bt_hci_read_remote_ext_features_complete(struct net_buf *buf);
+void bt_hci_role_change(struct net_buf *buf);
+void bt_hci_synchronous_conn_complete(struct net_buf *buf);