Bluetooth: Use only 2 bits for controller type information

The controller type is limited to BR/EDR/LE and AMP controllers. This
can be easily encoded with just 2 bits and still leave enough room
for future controller types.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 4549b5c..dd2528c5 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1610,7 +1610,7 @@
 
 	strcpy(di.name, hdev->name);
 	di.bdaddr   = hdev->bdaddr;
-	di.type     = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
+	di.type     = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
 	di.flags    = hdev->flags;
 	di.pkt_type = hdev->pkt_type;
 	if (lmp_bredr_capable(hdev)) {