ARM: dts: i.MX6ULL: U-Boot specific dts for u-boot, dm-spl

u-boot,dm-spl property is specific to U-Boot, so created one
for i.MX6ULL platforms.

Signed-off-by: Parthiban Nallathambi <parthitce@gmail.com>
diff --git a/arch/arm/dts/imx6ull-u-boot.dtsi b/arch/arm/dts/imx6ull-u-boot.dtsi
new file mode 100644
index 0000000..74ca95f
--- /dev/null
+++ b/arch/arm/dts/imx6ull-u-boot.dtsi
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Parthiban Nallathambi <parthitce@gmail.com>
+ */
+
+/ {
+	soc {
+		u-boot,dm-spl;
+	};
+};
+
+&aips1 {
+	u-boot,dm-spl;
+};
+
+&aips2 {
+	u-boot,dm-spl;
+};
+
+&aips3 {
+	u-boot,dm-spl;
+};
+
+&gpio1 {
+	u-boot,dm-spl;
+};
+
+&gpio4 {
+	u-boot,dm-spl;
+};
+
+&iomuxc {
+	u-boot,dm-spl;
+};
diff --git a/board/phytec/pcl063/MAINTAINERS b/board/phytec/pcl063/MAINTAINERS
index c65a951..037f243 100644
--- a/board/phytec/pcl063/MAINTAINERS
+++ b/board/phytec/pcl063/MAINTAINERS
@@ -3,6 +3,7 @@
 S:	Maintained
 F:	arch/arm/dts/imx6ul-pcl063.dtsi
 F:	arch/arm/dts/imx6ul-phycore-segin.dts
+F:	arch/arm/dts/imx6ull-u-boot.dtsi
 F:	board/phytec/pcl063/
 F:	configs/phycore_pcl063_defconfig
 F:	include/configs/pcl063.h