ARM: dts: uniphier: prepare device trees to use pinctrl in SPL

Add "u-boot,dm-pre-reloc" for device nodes we want in SPL DTB
(spl/u-boot-spl.dtb).

The "soc" node (this is simple-bus node) also needs the property
to bind the pinctrl node located under it.

I am collecting this U-Boot specific hack to the bottom of board
DTS rather than inserting "u-boot,dm-pre-reloc" into SoC DTSI.
My goal is to sync DTSI with Linux for easier maintenance.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/uniphier-ph1-ld4-ref.dts

@@ -61,6 +61,20 @@
 };
 
 /* for U-boot only */
+/ {
+	soc {
+		u-boot,dm-pre-reloc;
+	};
+};
+
 &serial0 {
 	u-boot,dm-pre-reloc;
 };
+
+&pinctrl {
+	u-boot,dm-pre-reloc;
+};
+
+&pinctrl_uart0 {
+	u-boot,dm-pre-reloc;
+};

arch/arm/dts/uniphier-ph1-ld6b-ref.dts

@@ -54,6 +54,20 @@
 };
 
 /* for U-boot only */
+/ {
+	soc {
+		u-boot,dm-pre-reloc;
+	};
+};
+
 &serial0 {
 	u-boot,dm-pre-reloc;
 };
+
+&pinctrl {
+	u-boot,dm-pre-reloc;
+};
+
+&pinctrl_uart0 {
+	u-boot,dm-pre-reloc;
+};

arch/arm/dts/uniphier-ph1-pro4-ref.dts

@@ -68,6 +68,20 @@
 };
 
 /* for U-boot only */
+/ {
+	soc {
+		u-boot,dm-pre-reloc;
+	};
+};
+
 &serial0 {
 	u-boot,dm-pre-reloc;
 };
+
+&pinctrl {
+	u-boot,dm-pre-reloc;
+};
+
+&pinctrl_uart0 {
+	u-boot,dm-pre-reloc;
+};

arch/arm/dts/uniphier-ph1-sld8-ref.dts

@@ -65,6 +65,20 @@
 };
 
 /* for U-boot only */
+/ {
+	soc {
+		u-boot,dm-pre-reloc;
+	};
+};
+
 &serial0 {
 	u-boot,dm-pre-reloc;
 };
+
+&pinctrl {
+	u-boot,dm-pre-reloc;
+};
+
+&pinctrl_uart0 {
+	u-boot,dm-pre-reloc;
+};