ARM: dts: motorola-cpcap-mapphone: add pwrbutton

Add power button.
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/motorola-cpcap-mapphone.dtsi

@@ -32,6 +32,12 @@ cpcap_rtc: rtc {
 			interrupt-parent = <&cpcap>;
 			interrupts = <39 IRQ_TYPE_NONE>, <26 IRQ_TYPE_NONE>;
 		};
+
+		power_button: button {
+			compatible = "motorola,cpcap-pwrbutton";
+
+			interrupts = <23 IRQ_TYPE_NONE>;
+		};
 	};
 };