Bluetooth: Modify LE window and interval for suspend

When a device is suspended, it doesn't need to be as responsive to
connection events. Increase the interval to 640ms (creating a duty cycle
of roughly 1.75%) so that passive scanning uses much less power (vs
previous duty cycle of 18.75%). The new window + interval combination
has been tested to work with HID devices (which are currently the only
devices capable of wake up).
Signed-off-by: NAbhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

net/bluetooth/hci_request.c

@@ -35,7 +35,7 @@
 #define HCI_REQ_CANCELED  2
 
 #define LE_SUSPEND_SCAN_WINDOW		0x0012
-#define LE_SUSPEND_SCAN_INTERVAL	0x0060
+#define LE_SUSPEND_SCAN_INTERVAL	0x0400
 
 void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
 {