Bluetooth: Use defines in in hci_get_auth_req()

Make the code in hci_get_auth_req() more readable by using the
defined macros instead of inlining magic numbers.
Signed-off-by: NMikel Astiz <mikel.astiz@bmw-carit.de>
Signed-off-by: NTimo Mueller <timo.mueller@bmw-carit.de>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>

net/bluetooth/hci_event.c

@@ -3024,17 +3024,20 @@ static void hci_key_refresh_complete_evt(struct hci_dev *hdev,
 static u8 hci_get_auth_req(struct hci_conn *conn)
 {
 	/* If remote requests dedicated bonding follow that lead */
-	if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03) {
+	if (conn->remote_auth == HCI_AT_DEDICATED_BONDING ||
+	    conn->remote_auth == HCI_AT_DEDICATED_BONDING_MITM) {
 		/* If both remote and local IO capabilities allow MITM
 		 * protection then require it, otherwise don't */
-		if (conn->remote_cap == 0x03 || conn->io_capability == 0x03)
-			return 0x02;
+		if (conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT ||
+		    conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)
+			return HCI_AT_DEDICATED_BONDING;
 		else
-			return 0x03;
+			return HCI_AT_DEDICATED_BONDING_MITM;
 	}
 
 	/* If remote requests no-bonding follow that lead */
-	if (conn->remote_auth == 0x00 || conn->remote_auth == 0x01)
+	if (conn->remote_auth == HCI_AT_NO_BONDING ||
+	    conn->remote_auth == HCI_AT_NO_BONDING_MITM)
 		return conn->remote_auth | (conn->auth_type & 0x01);
 
 	return conn->auth_type;