staging: wlan-ng: avoid CamelCase in fields of struct hfa384x_dbmcommsquality

Replace CamelCase fields of struct 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>