Input: cap11xx - add advanced sensitivity settings

Add support for advanced sensitivity settings that allows more precise
tunig of touch buttons. Input-treshold allows to set the sensitivity for
each channel separately. Also add signal guard feature for CAP129x chips.

Signed-off-by: Jiri Valek - 2N <jiriv@axis.com>
Link: https://lore.kernel.org/r/20231121155250.613242-3-jiriv@axis.com


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>