Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Freescale Semiconductor/MK21D5WS/SIM/SCGC7#0x0
DMA=0
System Clock Gating Control Register 7
no description available
DMA Clock Gate Control
0 (0): Clock disabled
1 (1): Clock enabled
https://github.com/cmsis-svd/cmsis-svd-data