qcom: ipq4019: add support for reset via qcom,ps-hold

This will allow these types of boards to be rebooted.
Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

arch/arm/boot/dts/qcom-ipq4019.dtsi

@@ -179,5 +179,10 @@ watchdog@b017000 {
 			timeout-sec = <10>;
 			status = "disabled";
 		};
+
+		restart@4ab000 {
+			compatible = "qcom,pshold";
+			reg = <0x4ab000 0x4>;
+		};
 	};
 };