ARM: dts: apq8064: add pm8921 pwrkey support

This patch adds support to pm8921 power button.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <agross@codeaurora.org>

arch/arm/boot/dts/qcom-apq8064.dtsi

@@ -373,6 +373,14 @@ rtc@11d {
 					allow-set-time;
 				};
 
+				pwrkey@1c {
+					compatible = "qcom,pm8921-pwrkey";
+					reg = <0x1c>;
+					interrupt-parent = <&pmicintc>;
+					interrupts = <50 1>, <51 1>;
+					debounce = <15625>;
+					pull-up;
+				};
 			};
 		};