Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32FG1P/EFR32FG1P131F256IM48/LDMA/SYNC#0x0
DMA Synchronization Trigger Register (Single-Cycle RMW)
Synchronization Trigger
https://github.com/cmsis-svd/cmsis-svd-data