default or selected kernelversion does not have config value CONFIG_KEYBOARD_SPITZ.
Result is shown for kernelversion 5.4.194

Spitz keyboard

modulename: spitzkbd.ko


Linux Kernel Configuration
└─>Device Drivers
└─>Input device support
└─>Spitz keyboard
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Say Y here to enable the keyboard on the Sharp Zaurus SL-C1000,
SL-C3000 and Sl-C3100 series of PDAs.

To compile this driver as a module, choose M here: the
module will be called spitzkbd.

source code: