Bluetooth: hci_qca: Fix uninitialized access to hdev

hdev is always allocated and not only when power control is required.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>