arm64: dts: imx8mm-venice-gw7: Adjust PCI Ethernet nodes

As per Rob Herring's feedback:

"The ethernet device should have a node name of
'ethernet'. The 'pcie' node name and 'device_type = "pci"' is for PCI
buses/bridges only."

Do it as suggested.

Fixes: d61c5068729a ("arm64: dts: imx8mm-venice-gw7: Fix pci sub-nodes")
Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm-venice-gw72xx.dtsi

@@ -178,9 +178,8 @@ pcie@3,0 {
 				#size-cells = <2>;
 				ranges;
 
-				eth1: pcie@0,0 {
+				eth1: ethernet@0,0 {
 					reg = <0x0000 0 0 0 0>;
-					device_type = "pci";
 					#address-cells = <3>;
 					#size-cells = <2>;
 					ranges;

arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx.dtsi

@@ -198,9 +198,8 @@ pcie@4,0 {
 				#size-cells = <2>;
 				ranges;
 
-				eth1: pcie@0,0 {
+				eth1: ethernet@0,0 {
 					reg = <0x0000 0 0 0 0>;
-					device_type = "pci";
 					#address-cells = <3>;
 					#size-cells = <2>;
 					ranges;

arch/arm64/boot/dts/freescale/imx8mm-venice-gw7902.dts

@@ -640,9 +640,8 @@ pcie@0,0 {
 		#size-cells = <2>;
 		ranges;
 
-		eth1: pcie@0,0 {
+		eth1: ethernet@0,0 {
 			reg = <0x0000 0 0 0 0>;
-			device_type = "pci";
 			#address-cells = <3>;
 			#size-cells = <2>;
 			ranges;