This adds support for probing the COH 901 318 DMA controller
and channels from the device tree.
Contains portions of a sketch patch from Arnd Bergmann.
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
