ARM: dts: rockchip: setup DMA-channels for mmc0 and emmc for rk3188

This commit enable DMA-based transfers for SD/eMMC card adapters
and reduce number of interrupts produced by SD-card/eMMC-card
adapters.

Sometimes interrupts from SD-card/eMMC-card adapters running in
PIO mode blocks execution of hrtimers and I2S DMA callbacks for
a long periods (100 ms or more).
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
[moved dma properties to rk3xxx.dtsi and added sdio dma]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3xxx.dtsi

@@ -223,6 +223,8 @@ mmc0: dwmmc@10214000 {
 		interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cru HCLK_SDMMC>, <&cru SCLK_SDMMC>;
 		clock-names = "biu", "ciu";
+		dmas = <&dmac2 1>;
+		dma-names = "rx-tx";
 		fifo-depth = <256>;
 		resets = <&cru SRST_SDMMC>;
 		reset-names = "reset";
@@ -235,6 +237,8 @@ mmc1: dwmmc@10218000 {
 		interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cru HCLK_SDIO>, <&cru SCLK_SDIO>;
 		clock-names = "biu", "ciu";
+		dmas = <&dmac2 3>;
+		dma-names = "rx-tx";
 		fifo-depth = <256>;
 		resets = <&cru SRST_SDIO>;
 		reset-names = "reset";
@@ -247,6 +251,8 @@ emmc: dwmmc@1021c000 {
 		interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cru HCLK_EMMC>, <&cru SCLK_EMMC>;
 		clock-names = "biu", "ciu";
+		dmas = <&dmac2 4>;
+		dma-names = "rx-tx";
 		fifo-depth = <256>;
 		resets = <&cru SRST_EMMC>;
 		reset-names = "reset";