dmaengine: add COMPILE_TEST for the drivers

We can do the compiling test with COMPILE_TEST.
This patch adds the COMPILE_TEST for the drivers.

Signed-off-by: Huang Shijie <sjhuang@iluvatar.ai>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Vinod Koul <vkoul@kernel.org>