ARM: dts: clps711x: Add keypad node

This adds missing keypad node to basic clps711x DT.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Link: https://lore.kernel.org/r/20210405051658.26779-2-shc_work@mail.ru'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/ep7209.dtsi

@@ -182,6 +182,13 @@ syscon3: syscon@80002200 {
 		};
 	};
 
+	keypad: keypad {
+		compatible = "cirrus,ep7209-keypad";
+		interrupts = <16>;
+		syscon = <&syscon1>;
+		status = "disabled";
+	};
+
 	mctrl: mctrl {
 		compatible = "cirrus,ep7209-mctrl-gpio";
 		gpio,syscon-dev = <&syscon1 0 0>;