Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/SiM3_NRND/SIM3L168_A/DMACTRL_0/CONFIG#0x0
DMAEN=DISABLED
Controller Configuration
DMA Enable.
0 (DISABLED): Disable the DMA controller.
1 (ENABLED): Enable the DMA controller.
https://github.com/cmsis-svd/cmsis-svd-data