ARM: dts: i.MX6UL: U-Boot specific dts for u-boot, dm-spl

u-boot,dm-spl property is specific to U-Boot, so move it into
*u-boot.dtsi files for relevant i.MX6UL files.

This make syncing Linux dts files straight forward.

Also update the MAINTAINERS file for dts files.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/arch/arm/dts/imx6ul-geam-kit-u-boot.dtsi b/arch/arm/dts/imx6ul-geam-kit-u-boot.dtsi
new file mode 100644
index 0000000..d1b77ba
--- /dev/null
+++ b/arch/arm/dts/imx6ul-geam-kit-u-boot.dtsi
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2018 Jagan Teki <jagan@amarulasolutions.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include "imx6ul-u-boot.dtsi"
+
+&usdhc1 {
+	u-boot,dm-spl;
+};
+
+&iomuxc {
+	pinctrl_usdhc1: usdhc1grp {
+		u-boot,dm-spl;
+	};
+
+	pinctrl_usdhc1_100mhz: usdhc1grp100mhz {
+		u-boot,dm-spl;
+	};
+
+	pinctrl_usdhc1_200mhz: usdhc1grp200mhz {
+		u-boot,dm-spl;
+	};
+};
diff --git a/arch/arm/dts/imx6ul-geam-kit.dts b/arch/arm/dts/imx6ul-geam-kit.dts
index 15e3f94..07c21cb 100644
--- a/arch/arm/dts/imx6ul-geam-kit.dts
+++ b/arch/arm/dts/imx6ul-geam-kit.dts
@@ -87,7 +87,6 @@
 };
 
 &usdhc1 {
-	u-boot,dm-spl;
 	pinctrl-names = "default", "state_100mhz", "state_200mhz";
 	pinctrl-0 = <&pinctrl_usdhc1>;
 	pinctrl-1 = <&pinctrl_usdhc1_100mhz>;
@@ -135,7 +134,6 @@
 	};
 
 	pinctrl_usdhc1: usdhc1grp {
-		u-boot,dm-spl;
 		fsl,pins = <
 			MX6UL_PAD_SD1_CMD__USDHC1_CMD     0x17059
 			MX6UL_PAD_SD1_CLK__USDHC1_CLK     0x10059
@@ -147,7 +145,6 @@
 	};
 
 	pinctrl_usdhc1_100mhz: usdhc1grp100mhz {
-		u-boot,dm-spl;
 		fsl,pins = <
 			MX6UL_PAD_SD1_CMD__USDHC1_CMD     0x170b9
 			MX6UL_PAD_SD1_CLK__USDHC1_CLK     0x100b9
@@ -159,7 +156,6 @@
 	};
 
 	pinctrl_usdhc1_200mhz: usdhc1grp200mhz {
-		u-boot,dm-spl;
 		fsl,pins = <
 			MX6UL_PAD_SD1_CMD__USDHC1_CMD     0x170f9
 			MX6UL_PAD_SD1_CLK__USDHC1_CLK     0x100f9
diff --git a/arch/arm/dts/imx6ul-isiot-emmc-u-boot.dtsi b/arch/arm/dts/imx6ul-isiot-emmc-u-boot.dtsi
new file mode 100644
index 0000000..7d0cc15
--- /dev/null
+++ b/arch/arm/dts/imx6ul-isiot-emmc-u-boot.dtsi
@@ -0,0 +1,11 @@
+/*
+ * Copyright (C) 2018 Jagan Teki <jagan@amarulasolutions.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include "imx6ul-isiot-u-boot.dtsi"
+
+&usdhc2 {
+	u-boot,dm-spl;
+};
diff --git a/arch/arm/dts/imx6ul-isiot-emmc.dts b/arch/arm/dts/imx6ul-isiot-emmc.dts
index 588beba..50ce2d7 100644
--- a/arch/arm/dts/imx6ul-isiot-emmc.dts
+++ b/arch/arm/dts/imx6ul-isiot-emmc.dts
@@ -42,6 +42,7 @@
 
 /dts-v1/;
 
+#include "imx6ul.dtsi"
 #include "imx6ul-isiot.dtsi"
 
 / {
diff --git a/arch/arm/dts/imx6ul-isiot-nand.dts b/arch/arm/dts/imx6ul-isiot-nand.dts
index 12a3528..ffdaf34 100644
--- a/arch/arm/dts/imx6ul-isiot-nand.dts
+++ b/arch/arm/dts/imx6ul-isiot-nand.dts
@@ -42,6 +42,7 @@
 
 /dts-v1/;
 
+#include "imx6ul.dtsi"
 #include "imx6ul-isiot.dtsi"
 
 / {
diff --git a/arch/arm/dts/imx6ul-isiot-u-boot.dtsi b/arch/arm/dts/imx6ul-isiot-u-boot.dtsi
new file mode 100644
index 0000000..f98c395
--- /dev/null
+++ b/arch/arm/dts/imx6ul-isiot-u-boot.dtsi
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2018 Jagan Teki <jagan@amarulasolutions.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include "imx6ul-u-boot.dtsi"
+
+&usdhc1 {
+	u-boot,dm-spl;
+};
+
+&pinctrl_usdhc1 {
+	u-boot,dm-spl;
+};
+
+&pinctrl_usdhc2 {
+	u-boot,dm-spl;
+};
diff --git a/arch/arm/dts/imx6ul-isiot.dtsi b/arch/arm/dts/imx6ul-isiot.dtsi
index e645c12..4ed7313 100644
--- a/arch/arm/dts/imx6ul-isiot.dtsi
+++ b/arch/arm/dts/imx6ul-isiot.dtsi
@@ -42,7 +42,6 @@
 
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
-#include "imx6ul.dtsi"
 
 / {
 	memory {
@@ -82,7 +81,6 @@
 };
 
 &usdhc1 {
-	u-boot,dm-spl;
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_usdhc1>;
 	cd-gpios = <&gpio1 19 GPIO_ACTIVE_LOW>;
@@ -138,7 +136,6 @@
 	};
 
 	pinctrl_usdhc1: usdhc1grp {
-		u-boot,dm-spl;
 		fsl,pins = <
 			MX6UL_PAD_SD1_CMD__USDHC1_CMD     0x17059
 			MX6UL_PAD_SD1_CLK__USDHC1_CLK     0x10059
diff --git a/arch/arm/dts/imx6ul-u-boot.dtsi b/arch/arm/dts/imx6ul-u-boot.dtsi
new file mode 100644
index 0000000..08d7747
--- /dev/null
+++ b/arch/arm/dts/imx6ul-u-boot.dtsi
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2018 Jagan Teki <jagan@amarulasolutions.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+/ {
+	soc {
+		u-boot,dm-spl;
+	};
+};
+
+&aips1 {
+	u-boot,dm-spl;
+};
+
+&gpio1 {
+	u-boot,dm-spl;
+};
+
+&gpio4 {
+	u-boot,dm-spl;
+};
+
+&iomuxc {
+	u-boot,dm-spl;
+};
+
+&aips2 {
+	u-boot,dm-spl;
+};
diff --git a/arch/arm/dts/imx6ul.dtsi b/arch/arm/dts/imx6ul.dtsi
index d5ce3f1..b33e624 100644
--- a/arch/arm/dts/imx6ul.dtsi
+++ b/arch/arm/dts/imx6ul.dtsi
@@ -134,7 +134,6 @@
 		compatible = "simple-bus";
 		interrupt-parent = <&gpc>;
 		ranges;
-		u-boot,dm-spl;
 
 		pmu {
 			compatible = "arm,cortex-a7-pmu";
@@ -186,7 +185,6 @@
 			#size-cells = <1>;
 			reg = <0x02000000 0x100000>;
 			ranges;
-			u-boot,dm-spl;
 
 			spba-bus@02000000 {
 				compatible = "fsl,spba-bus", "simple-bus";
@@ -418,7 +416,6 @@
 				#interrupt-cells = <2>;
 				gpio-ranges = <&iomuxc  0 23 10>, <&iomuxc 10 17 6>,
 					      <&iomuxc 16 33 16>;
-				u-boot,dm-spl;
 			};
 
 			gpio2: gpio@020a0000 {
@@ -455,7 +452,6 @@
 				interrupt-controller;
 				#interrupt-cells = <2>;
 				gpio-ranges = <&iomuxc 0 94 17>, <&iomuxc 17 117 12>;
-				u-boot,dm-spl;
 			};
 
 			gpio5: gpio@020ac000 {
@@ -654,7 +650,6 @@
 			iomuxc: iomuxc@020e0000 {
 				compatible = "fsl,imx6ul-iomuxc";
 				reg = <0x020e0000 0x4000>;
-				u-boot,dm-spl;
 			};
 
 			gpr: iomuxc-gpr@020e4000 {
@@ -735,7 +730,6 @@
 			#size-cells = <1>;
 			reg = <0x02100000 0x100000>;
 			ranges;
-			u-boot,dm-spl;
 
 			usbotg1: usb@02184000 {
 				compatible = "fsl,imx6ul-usb", "fsl,imx27-usb";