arm: dts: imx8qxp: fix build warining

Fix below build warning.

arch/arm/dts/fsl-imx8qxp-mek.dtb: Warning (avoid_unnecessary_addr_size):
/regulators: unnecessary #address-cells/#size-cells without "ranges"
or child "reg" property

Signed-off-by: Peng Fan <peng.fan@nxp.com>

arch/arm/dts/fsl-imx8qxp-mek.dts

@@ -18,8 +18,6 @@
 
 	regulators {
 		compatible = "simple-bus";
-		#address-cells = <1>;
-		#size-cells = <0>;
 
 		reg_usdhc2_vmmc: usdhc2-vmmc {
 			compatible = "regulator-fixed";