Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32BG1B/EFR32BG1B232F256GM48/LDMA/REQDIS#0x0
DMA Channel Request Disable Register
DMA Request Disables
https://github.com/cmsis-svd/cmsis-svd-data