Input: xpad - rename QH controller to Legion Go S

Input: xpad - rename QH controller to Legion Go S

The QH controller is actually the controller of the Legion Go S, with
the manufacturer string wch.cn and product name Legion Go S in its
USB descriptor. A cursory lookup of the VID reveals the same.

Therefore, rename the xpad entries to match.

Signed-off-by: Antheas Kapenekakis <lkml@antheas.dev>
Link: https://lore.kernel.org/r/20250222170010.188761-4-lkml@antheas.dev
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>