LF-5811-2 : arm64: dts: imx8dxl-evk: enable imx8dxl_cm4 device node

Enable imx8dxl_cm4 and disable cm40_lpuart device nodes by default
so that the standard imx8dxl-evk.dtb can be used to test the rpmsg
CM4 remoteproc.

Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com>

arch/arm64/boot/dts/freescale/imx8dxl-evk.dts

@@ -348,7 +348,7 @@ mt35xu512aba0: flash@0 {
 &imx8dxl_cm4 {
 	memory-region = <&vdevbuffer>, <&vdev0vring0>, <&vdev0vring1>,
 			<&vdev1vring0>, <&vdev1vring1>, <&rsc_table>;
-	status = "disabled";
+	status = "okay";
 };
 
 &lpspi3 {
@@ -550,7 +550,7 @@ i2c@4 {
 };
 
 &cm40_intmux {
-	status = "okay";
+	status = "disabled";
 };
 
 &lpuart0 {
@@ -569,7 +569,7 @@ &lpuart1 {
 &cm40_lpuart {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_cm40_lpuart>;
-	status = "okay";
+	status = "disabled";
 };
 
 &flexcan2 {