aspeed: Device Tree configuration for Reset Driver

Add Reset Driver configuration to ast2500 SoC Device Tree and bindings
for various reset signals

Signed-off-by: Maxim Sloyko <maxims@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/ast2500-evb.dts b/arch/arm/dts/ast2500-evb.dts
index dc13952..723941a 100644
--- a/arch/arm/dts/ast2500-evb.dts
+++ b/arch/arm/dts/ast2500-evb.dts
@@ -21,3 +21,18 @@
 &sdrammc {
 	clock-frequency = <400000000>;
 };
+
+&wdt1 {
+	u-boot,dm-pre-reloc;
+	status = "okay";
+};
+
+&wdt2 {
+	u-boot,dm-pre-reloc;
+	status = "okay";
+};
+
+&wdt3 {
+	u-boot,dm-pre-reloc;
+	status = "okay";
+};