feat(n1sdp): enable trusted board boot on n1sdp

Move from RESET_TO_BL31 boot to a TBBR style boot on N1sdp.

Signed-off-by: sahil <sahil@arm.com>
Change-Id: I153ccb43a4a013830973c7a183825d62b372c65e
diff --git a/plat/arm/board/n1sdp/n1sdp_err.c b/plat/arm/board/n1sdp/n1sdp_err.c
new file mode 100644
index 0000000..629e76a
--- /dev/null
+++ b/plat/arm/board/n1sdp/n1sdp_err.c
@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <plat/arm/common/plat_arm.h>
+
+/*
+ * n1sdp error handler
+ */
+void __dead2 plat_arm_error_handler(int err)
+{
+	while (true) {
+		wfi();
+	}
+}