arm64: dts: broadcom: bcm4908: fix switch parent node name

Ethernet switch and MDIO are grouped using "simple-bus". It's not
allowed to use "ethernet-switch" node name as it isn't a switch. Replace
it with "bus".

Fixes: 527a3ac9 ("arm64: dts: broadcom: bcm4908: describe internal switch")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm64/boot/dts/broadcom/bcm4908/bcm4908.dtsi

@@ -156,7 +156,7 @@ xhci: usb@d000 {
 			status = "disabled";
 		};
 
-		ethernet-switch@80000 {
+		bus@80000 {
 			compatible = "simple-bus";
 			#size-cells = <1>;
 			#address-cells = <1>;