ARM: dts: exynos: correct PMIC interrupt trigger level on Monk

The Samsung PMIC datasheets describe the interrupt line as active low
with a requirement of acknowledge from the CPU.  Without specifying the
interrupt type in Devicetree, kernel might apply some fixed
configuration, not necessarily working for this hardware.

Fixes: e0cefb3f ("ARM: dts: add board dts file for Exynos3250-based Monk board")
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210212903.216728-2-krzk@kernel.org

arch/arm/boot/dts/exynos3250-monk.dts

@@ -200,7 +200,7 @@
 	pmic@66 {
 		compatible = "samsung,s2mps14-pmic";
 		interrupt-parent = <&gpx0>;
-		interrupts = <7 IRQ_TYPE_NONE>;
+		interrupts = <7 IRQ_TYPE_LEVEL_LOW>;
 		reg = <0x66>;
 		wakeup-source;