imx: kontron-sl-mx8mm: Sync dts files and fix ethernet

This syncs the devicetree files with the latest Linux kernel (5.19-rc2).
This also fixes the currently broken ethernet support:

Before:

  Net:   Could not get PHY for FEC0: addr 0

After:

  Net:   eth0: ethernet@30be0000

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
diff --git a/arch/arm/dts/imx8mm-kontron-n801x-som.dtsi b/arch/arm/dts/imx8mm-kontron-n801x-som.dtsi
index c3418d2..8f90eb0 100644
--- a/arch/arm/dts/imx8mm-kontron-n801x-som.dtsi
+++ b/arch/arm/dts/imx8mm-kontron-n801x-som.dtsi
@@ -63,10 +63,10 @@
 &ecspi1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_ecspi1>;
-	cs-gpios = <&gpio5 9 GPIO_ACTIVE_HIGH>;
+	cs-gpios = <&gpio5 9 GPIO_ACTIVE_LOW>;
 	status = "okay";
 
-	spi-flash@0 {
+	flash@0 {
 		compatible = "mxicy,mx25r1635f", "jedec,spi-nor";
 		spi-max-frequency = <80000000>;
 		reg = <0>;
@@ -154,7 +154,7 @@
 			reg_vdd_snvs: LDO2 {
 				regulator-name = "ldo2";
 				regulator-min-microvolt = <800000>;
-				regulator-max-microvolt = <800000>;
+				regulator-max-microvolt = <900000>;
 				regulator-boot-on;
 				regulator-always-on;
 			};