Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG11B/EFM32GG11B320F2048GL112/EMU/R5VDETCTRL#0x0
5V Detector Enables
VREGI Detector Disable
VBUS Detector Disable
VREGO Detector Disable
https://github.com/cmsis-svd/cmsis-svd-data