linux-phytec-ti

dma: mxs-dma: let dma_is_apbh and apbh_is_old take parameter

Let macros dma_is_apbh and apbh_is_old take mxs_dma as parameter
to make the code easy to read.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>