staging: wlan-ng: avoid CamelCase: hfa384x_HostScanRequest_data

Replace CamelCase struct name and fields with underscores to comply
with the standard kernel coding style.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>