This makes Logitech PS2++ protocol implementation consistent with
the naming in other protocols. Also mark the stub as "static inline"
Reviewed-by: NHans de Goede <hdegoede@redhat.com>
Tested-by: NMarcin Sochacki <msochacki+kernel@gmail.com>
Tested-by: NTill <till2.schaefer@uni-dortmund.de>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>