imx6: dts: add 'u-boot, dm-pre-reloc' to soc and ipu nodes

u-boot,dm-pre-reloc is required for reserving video memory
when binding DM_VIDEO driver.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/arch/arm/dts/imx6qdl.dtsi b/arch/arm/dts/imx6qdl.dtsi
index e4daf15..c0a9478 100644
--- a/arch/arm/dts/imx6qdl.dtsi
+++ b/arch/arm/dts/imx6qdl.dtsi
@@ -145,6 +145,7 @@
 		compatible = "simple-bus";
 		interrupt-parent = <&gpc>;
 		ranges;
+		u-boot,dm-pre-reloc;
 
 		dma_apbh: dma-apbh@110000 {
 			compatible = "fsl,imx6q-dma-apbh", "fsl,imx28-dma-apbh";
@@ -1261,6 +1262,7 @@
 				 <&clks IMX6QDL_CLK_IPU1_DI1>;
 			clock-names = "bus", "di0", "di1";
 			resets = <&src 2>;
+			u-boot,dm-pre-reloc;
 
 			ipu1_csi0: port@0 {
 				reg = <0>;