Bluetooth: Read current IAC LAP on controller setup

Read the current IAC LAP values when initializing the controller. The
values are not used, but it is good to have them in the trace files
for debugging purposes.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

include/net/bluetooth/hci.h

@@ -821,6 +821,8 @@ struct hci_rp_read_num_supported_iac {
 	__u8	num_iac;
 } __packed;
 
+#define HCI_OP_READ_CURRENT_IAC_LAP	0x0c39
+
 #define HCI_OP_WRITE_INQUIRY_MODE	0x0c45
 
 #define HCI_MAX_EIR_LENGTH		240

net/bluetooth/hci_core.c

@@ -373,6 +373,9 @@ static void bredr_setup(struct hci_request *req)
 	/* Read Number of Supported IAC */
 	hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
 
+	/* Read Current IAC LAP */
+	hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
+
 	/* Clear Event Filters */
 	flt_type = HCI_FLT_CLEAR_ALL;
 	hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);