arm64: dts: freescale: imx8: Fix power controller name

The proper name is power-controller, not imx8qx-pd.
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8qm.dtsi

@@ -190,7 +190,7 @@ scu {
 			  &lsio_mu1 1 0
 			  &lsio_mu1 3 3>;
 
-		pd: imx8qx-pd {
+		pd: power-controller {
 			compatible = "fsl,imx8qm-scu-pd", "fsl,scu-pd";
 			#power-domain-cells = <1>;
 		};

arch/arm64/boot/dts/freescale/imx8qxp.dtsi

@@ -210,7 +210,7 @@ scu {
 			  &lsio_mu1 1 0
 			  &lsio_mu1 3 3>;
 
-		pd: imx8qx-pd {
+		pd: power-controller {
 			compatible = "fsl,imx8qxp-scu-pd", "fsl,scu-pd";
 			#power-domain-cells = <1>;
 		};