ARM: dts: TWL4030: Add keypad node

Add keypad node to twl4030, so that board DTS
files can just add the keymap.
Signed-off-by: NSebastian Reichel <sre@debian.org>
Signed-off-by: NBenoit Cousson <bcousson@baylibre.com>

arch/arm/boot/dts/twl4030.dtsi

@@ -145,4 +145,11 @@
 		compatible = "ti,twl4030-pwrbutton";
 		interrupts = <8>;
 	};
+
+	twl_keypad: keypad {
+		compatible = "ti,twl4030-keypad";
+		interrupts = <1>;
+		keypad,num-rows = <8>;
+		keypad,num-columns = <8>;
+	};
 };