default or selected kernelversion does not have config value CONFIG_RTC_DRV_PARISC.
Result is shown for kernelversion 5.3.7

PA-RISC firmware RTC support

modulename: rtc-parisc.ko

configname: CONFIG_RTC_DRV_PARISC

Linux Kernel Configuration
└─>Device Drivers
└─>Real Time Clock
└─>PA-RISC firmware RTC support
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
Say Y or M here to enable RTC support on PA-RISC systems using
firmware calls. If you do not know what you are doing, you should
just say Y.

source code: