Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32FG1P/EFR32FG1P131F128GM32/EMU/DCDCLNVCTRL#0x0
DCDC Low Noise Voltage Register
Low Noise Mode Feedback Attenuation
Low Noise Mode VREF Trim
https://github.com/cmsis-svd/cmsis-svd-data