arm64: dts: broadcom: bcm4908: add Ethernet TX irq

This hardware supports two interrupts, one per DMA channel (RX and TX).
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

@@ -116,8 +116,9 @@ enet: ethernet@2000 {
 			compatible = "brcm,bcm4908-enet";
 			reg = <0x2000 0x1000>;
 
-			interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
-			interrupt-names = "rx";
+			interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "rx", "tx";
 		};
 
 		usb_phy: usb-phy@c200 {