arm64: dts: mba8mx: Fix Ethernet PHY IRQ support

Ethernet PHY interrupt mode is level triggered. Adjust the mode
accordingly.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Fixes: 70cf622 ("arm64: dts: mba8mx: Add Ethernet PHY IRQ support")
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: tq-steina

arch/arm64/boot/dts/freescale/mba8mx.dtsi

@@ -192,7 +192,7 @@
 			reset-assert-us = <500000>;
 			reset-deassert-us = <500>;
 			interrupt-parent = <&expander2>;
-			interrupts = <6 IRQ_TYPE_EDGE_FALLING>;
+			interrupts = <6 IRQ_TYPE_LEVEL_LOW>;
 		};
 	};
 };