dts: arm: gigadevice: add support for gd32f450ik

Add support for the IK variant (256K SRAM, 3072K ROM).

Signed-off-by: Gerard Marull-Paretas <[email protected]>

Author: gmarull

dts/arm/gigadevice/gd32f4xx/gd32f450ik.dtsi

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2021 Teslabs Engineering S.L.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <mem.h>
+#include <gigadevice/gd32f4xx/gd32f4xx.dtsi>
+
+/ {
+	soc {
+		flash-controller@40023c00 {
+			flash0: flash@8000000 {
+				reg = <0x08000000 DT_SIZE_K(3072)>;
+			};
+		};
+	};
+};