arm/dt: lenok: Warn a long key press with vibration

Unintended power off may happen by long key press. So if power key is pressed
for over 6 seconds, vibe for the notification.

Change-Id: I10b0ea8cf50ebbe9a6e231a6d56b584f5656506f
Signed-off-by: Devin Kim <dojip.kim@lge.com>

arch/arm/boot/dts/apq8026-lenok/apq8026-lenok-misc.dtsi

@@ -11,7 +11,7 @@
  */
 
 &soc {
-	vibrator@fd8C3420 {
+	vibrator: vibrator@fd8C3420 {
 		status = "ok";
 		compatible = "msm,pwm_vibrator";
 		reg = <0xfd8C3420 0x400>;

arch/arm/boot/dts/apq8026-lenok/apq8026-lenok-pm.dtsi

@@ -13,6 +13,8 @@
 &spmi_bus {
 	qcom,pm8226@0 {
 		qcom,power-on@800 {
+			qcom,external-vibrator = <&vibrator>;
+			qcom,longkey-warn-time = <6000>;
 			qcom,pon_2 {
 				status = "disabled";
 			};