arm: lpc32xx: add EA LPC3250 DevKitv2 board support

Add basic support for running U-Boot on the Embedded Artists LPC3250
Developer's Kit v2 board by launching U-Boot from the board's s1l loader
(which comes pre-installed on the board).

Signed-off-by: Trevor Woerner <twoerner@gmail.com>
diff --git a/arch/arm/dts/lpc3250-ea3250-u-boot.dtsi b/arch/arm/dts/lpc3250-ea3250-u-boot.dtsi
new file mode 100644
index 0000000..0c82e51
--- /dev/null
+++ b/arch/arm/dts/lpc3250-ea3250-u-boot.dtsi
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2021 Trevor Woerner <twoerner@gmail.com>
+ */
+
+/{
+	model = "Embedded Artists LPC3250 DevKit v2 board based on the NXP LPC3250 SoC";
+	chosen {
+		stdout-path = &uart5;
+	};
+};
+
+&uart5 {
+	compatible = "nxp,lpc3220-uart", "ns16550a";
+};