Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series0/EFM32GG/EFM32GG995F512/USB/DOEP2_DMAADDR#0x0
Device OUT Endpoint x+1 DMA Address Register
DMA Address
https://github.com/cmsis-svd/cmsis-svd-data