Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG11B/EFM32GG11B820F2048GL192/SDIO/MAXCURCAPAB#0x0
Maximum Current Capabilities Register
Maximum Current for 3.3V
Maximum Current for 3.0V
Maximum Current for 1.8V
https://github.com/cmsis-svd/cmsis-svd-data