Fix HDHR device discovery

Fix HDHR device discovery code path:
dev_init()
  discover_devices()
    hdhomerun_discover_find_devices_custom()
    get_dev_model_and_fw()
      parse_http_page()
        hdhomerun_parser()

Change-Id: Ib943026a73ed24ad289d286823983e34bd818e9c
5 files changed