Input: auo-pixcir-ts - switch to using generic device properties

Let's use generic device properties API instead of OF-specific one.

Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20220914141428.2201784-4-dmitry.torokhov@gmail.com


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