ARM: dts: qcom: apq8060-dragonboard: move regulators out of simple-bus

Regulators is not a bus, so drop incomplete simple-bus usage to fix dtbs
W=1 warnings:

  Warning (simple_bus_reg): /regulators/regulator-fixed: missing or empty reg/ranges property
  Warning (simple_bus_reg): /regulators/xc622a331mrg: missing or empty reg/ranges property
  Warning (simple_bus_reg): /regulators/nds332p: missing or empty reg/ranges property
  Warning (simple_bus_reg): /regulators/txb0104rgyr: missing or empty reg/ranges property
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230420075053.41976-8-krzysztof.kozlowski@linaro.org

arch/arm/boot/dts/qcom-apq8060-dragonboard.dts

@@ -18,9 +18,6 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
-	regulators {
-		compatible = "simple-bus";
-
 	/* Main power of the board: 3.7V */
 	vph: regulator-fixed {
 		compatible = "regulator-fixed";
@@ -62,7 +59,6 @@ dragon_vio_txb: txb0104rgyr {
 		vin-supply = <&pm8058_l14>;
 		regulator-always-on;
 	};
-	};
 
 	/*
 	 * Capella CM3605 light and proximity sensor mounted directly