Add a new command line option 'd' to use DMA for data transfers.
It should be used with read, write or copy commands.
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: NAlan Mikhak <alan.mikhak@sifive.com>