Commit 876a1ea471ef ("dma: Support for 3 bytes word size") and
commit d4b99ae8fa6d ("dmaengine: Add 16 bytes, 32 bytes and 64 bytes
bus widths") added additional values for the allowed word size, but
omitted these from the struct dma_slave_config documentation.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>