arm64: dts: qcom: fix usb digital voltage levels

This patch updates the digital voltage levels from corner values to
microvolts as we are going to use s1 regulator directly for vddcx
instead of s1_corner.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

arch/arm64/boot/dts/qcom/msm8916.dtsi

@@ -430,7 +430,7 @@ usb_otg: phy@78d9000 {
 			interrupts = <GIC_SPI 134 IRQ_TYPE_EDGE_BOTH>,
 				     <GIC_SPI 140 IRQ_TYPE_EDGE_RISING>;
 
-			qcom,vdd-levels = <1 5 7>;
+			qcom,vdd-levels = <500000 1000000 1320000>;
 			qcom,phy-init-sequence = <0x44 0x6B 0x24 0x13>;
 			dr_mode = "peripheral";
 			qcom,otg-control = <2>; // PMIC