ARM: dts: aspeed: Add watchdog 1 optional properties.

Define external-signal and no system reset optional parameters to the dev tree so that watchdog 1 can be configured for these modes.

---
v3 - Fix commit message
v2 - Update optional properties based on latest community feedback.

---
 arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts | 5 +++++
 1 file changed, 5 insertions(+)

index 31315d0..44dad21 100644
@@ -420,6 +420,11 @@
 	aspeed,external-nodes = <&gfx &lhc>;
 };
 
+&wdt1 {
+	aspeed,reset-type = "none";
+	aspeed,external-signal;
+};
+
 &wdt2 {
 	status = "okay";
 };

1.8.2.2