ARM: DTS: da850: Enable DMA for SPI1

Add the needed bindings so the SPI driver can use DMA with SPI1.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: NSushaanth Srirangapathi <sushaanth.s@ti.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

arch/arm/boot/dts/da850.dtsi

@@ -285,6 +285,8 @@
 			num-cs = <4>;
 			ti,davinci-spi-intr-line = <1>;
 			interrupts = <56>;
+			dmas = <&edma0 18 0>, <&edma0 19 0>;
+			dma-names = "rx", "tx";
 			status = "disabled";
 		};
 		mdio: mdio@1e24000 {