board/rdn2: add board support for rdn2 platform

Add the initial board support for RD-N2 platform.

Change-Id: I8325885bf248dd92191d6fc92a2da91c23118f8c
Signed-off-by: Aditya Angadi <aditya.angadi@arm.com>
diff --git a/plat/arm/board/rdn2/rdn2_err.c b/plat/arm/board/rdn2/rdn2_err.c
new file mode 100644
index 0000000..802ac21
--- /dev/null
+++ b/plat/arm/board/rdn2/rdn2_err.c
@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <plat/arm/common/plat_arm.h>
+
+/*
+ * rdn2 error handler
+ */
+void __dead2 plat_arm_error_handler(int err)
+{
+	while (1) {
+		wfi();
+	}
+}