The dma driver requires both src and dst to be set.
This fix is needed in order to run gadget mass storage.
Patch is verified on snowball.
Signed-off-by: NPer Forlin <per.forlin@linaro.org>
Acked-by: NMian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Unaligned sizes and buffers are not supported and they will be filtered
out by is_compatible().
Signed-off-by: NMian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>