Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG12B/EFM32GG12B510F1024GQ100/MSC/CMD#0x0
Command Register
Flash Power Up Command
BANK SWITCHING COMMAND
https://github.com/cmsis-svd/cmsis-svd-data