configs: rockchip: rock960: enable DMA for SDHCI controller

Enable the SDMA controller so the eMMC connected to the SDHCI
controller (sdhci@fe330000) can make use of it.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
1 file changed