arm64: versal2: Add support for AMD Versal Gen 2

Add support for AMD Versal Gen 2. SoC is based on Cortex-a78ae 4 cluster/2
cpu core each. A lot of IPs are shared with previous families. There are
couple of new IP blocks where the most interesting from user point of view
is UFS.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/bc2b70831ce1031bd0fac32357bff84936e1310f.1716994063.git.michal.simek@amd.com

arch/arm/dts/amd-versal2-virt.dts

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Empty device tree for amd-versal2-virt board
+ *
+ * Copyright (C) 2024, Advanced Micro Devices, Inc.
+ */
+
+/dts-v1/;
+
+/ {
+};