arm64: dts: qcom: qcs6490-rb3gen2: fix root node overlay for phy-supply (#454)

arm64: dts: qcom: qcs6490-rb3gen2: fix root node overlay for phy-supply

Author: sgaud-quic

arch/arm64/boot/dts/qcom/qcs6490-rb3gen2-staging.dtso

@@ -9,7 +9,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 
-/ {
+&{/} {
 	qep_vreg: qep_vreg {
 		compatible = "regulator-fixed";
 		regulator-name = "qep_vreg";