ARM: dts: aspeed: witherspoon: Enable checkstop and cooling gpio keys

Enable gpio-keys events for the checkstop and water/air cooled
gpios for use by applications on the Witherspoon system.
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts

@@ -28,6 +28,22 @@ flash_memory: region@98000000 {
 		};
 	};
 
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		air-water {
+			label = "air-water";
+			gpios = <&gpio ASPEED_GPIO(B, 5) GPIO_ACTIVE_LOW>;
+			linux,code = <ASPEED_GPIO(B, 5)>;
+		};
+
+		checkstop {
+			label = "checkstop";
+			gpios = <&gpio ASPEED_GPIO(J, 2) GPIO_ACTIVE_LOW>;
+			linux,code = <ASPEED_GPIO(J, 2)>;
+		};
+	};
+
 	gpio-keys-polled {
 		compatible = "gpio-keys-polled";
 		#address-cells = <1>;