Bluetooth: btusb: Add gpio reset way for qca btsoc in cmd_timeout

if platform provide gpio connect to BT_EN reset pin of qca btsoc chip,
we can do hardware reset instead of usb port reset.

Signed-off-by: Tim Jiang <tjiang@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>