default or selected kernelversion does not have config value CONFIG_CLK_SIFIVE_FU540_PRCI.
Result is shown for kernelversion 6.9.8

PRCI driver for SiFive FU540 SoCs

modulename: fu540-prci.ko

configname: CONFIG_CLK_SIFIVE_FU540_PRCI

Linux Kernel Configuration
└─>Device Drivers
└─>Common Clock Framework
└─>SiFive SoC driver support
└─>PRCI driver for SiFive FU540 SoCs
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Supports the Power Reset Clock interface (PRCI) IP block found in
FU540 SoCs. If this kernel is meant to run on a SiFive FU540 SoC,
enable this driver.

source code: