staging: r8188eu: rename odm_SignalScaleMapping()

Rename odm_SignalScaleMapping() to avoid camel case.

odm_SignalScaleMapping -> odm_signal_scale_mapping

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220911161949.11293-2-straube.linux@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>