ARM: dts: am335x-shc: add u-boot specific dtsi

add u-boot specific am335x-shc-u-boot.dtsi file,
in which we add u-boot specific adaptions.

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/dts/am335x-shc-u-boot.dtsi b/arch/arm/dts/am335x-shc-u-boot.dtsi
new file mode 100644
index 0000000..2975839
--- /dev/null
+++ b/arch/arm/dts/am335x-shc-u-boot.dtsi
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Heiko Schocher <hs@denx.de>
+ */
+
+/ {
+	ocp {
+		u-boot,dm-pre-reloc;
+	};
+};
+
+&l4_wkup {
+	u-boot,dm-pre-reloc;
+};
+
+&scm {
+	u-boot,dm-pre-reloc;
+};
+
+&am33xx_pinmux {
+	u-boot,dm-pre-reloc;
+};
+
+&uart0_pins {
+	u-boot,dm-pre-reloc;
+};
+
+&uart0 {
+	u-boot,dm-pre-reloc;
+};
+
+&mmc1 {
+	u-boot,dm-pre-reloc;
+	cd-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
+};
+
+&emmc_pins {
+	u-boot,dm-pre-reloc;
+};
+
+&mmc2 {
+	u-boot,dm-pre-reloc;
+};
+
+&mmc1_pins {
+	u-boot,dm-pre-reloc;
+};
+
+&mmc3 {
+	status = "disabled";
+};