arm64: versal: Add mini configuration for Versal

This patch adds new mini target for versal.
This configuration is very minimal in size which runs
from OCM. It contains support for mtest which can be
used for running DDR memory tests.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/dts/Makefile

@@ -187,6 +187,7 @@ dtb-$(CONFIG_ARCH_ZYNQMP) += \
 	zynqmp-zc1751-xm018-dc4.dtb		\
 	zynqmp-zc1751-xm019-dc5.dtb
 dtb-$(CONFIG_ARCH_VERSAL) += \
+	versal-mini.dtb \
 	versal-mini-emmc0.dtb \
 	versal-mini-emmc1.dtb
 dtb-$(CONFIG_ARCH_ZYNQMP_R5) += \

arch/arm/dts/versal-mini.dts

@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dts file for Xilinx Versal Mini Configuration
+ *
+ * (C) Copyright 2019, Xilinx, Inc.
+ *
+ * Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
+ */
+
+/dts-v1/;
+
+/ {
+	model = "Versal MINI";
+	compatible = "xlnx,versal";
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	aliases {
+		serial0 = &dcc;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0xfffc0000 0x0 0x40000>, <0x0 0x0 0x0 0x80000000>;
+	};
+
+	dcc: dcc {
+		compatible = "arm,dcc";
+		status = "okay";
+		u-boot,dm-pre-reloc;
+	};
+};