arm64: dts: imx8mm-verdin: use level interrupt for mcp251xfd

Switch to level interrupt for mcp251xfd. This will make sure no
interrupts are lost.
Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Reported-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Fixes: 6a57f224 ("arm64: dts: freescale: add initial support for verdin imx8m mini")
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi

@@ -203,7 +203,7 @@ &ecspi3 {
 	can1: can@0 {
 		compatible = "microchip,mcp251xfd";
 		clocks = <&clk40m>;
-		interrupts-extended = <&gpio1 6 IRQ_TYPE_EDGE_FALLING>;
+		interrupts-extended = <&gpio1 6 IRQ_TYPE_LEVEL_LOW>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_can1_int>;
 		reg = <0>;