arm: dts: increase max vdd cpu to 1.45v to support 1.8g

pick from d5304b6

Change-Id: Idfbd429bef908aa441e5f52a70db0abd958863fe

Author: Andy3Kuo

arch/arm/boot/dts/rk3288-tinker-board.dts

@@ -390,7 +390,7 @@
 				regulator-always-on;
 				regulator-boot-on;
 				regulator-min-microvolt = <750000>;
-				regulator-max-microvolt = <1400000>;
+				regulator-max-microvolt = <1450000>;
 				regulator-name = "vdd_arm";
 				regulator-ramp-delay = <6000>;
 				regulator-state-mem {