EVDMA register access has been cleaned up to remove redundant macros.
EVDMA_PLAIN_DATA enum has also been added of value 0x3F which previously
had been assumed to be a masking of all the other values but isn't, it's
its own distinct value. Other enums still exist for future use.
Signed-off-by: David Jewsbury <david.jewsbury@nordicsemi.no>
1cbaa5f3f5