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

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: faaf348e ("ARM: dts: Add board dts file for exynos3250-rinato")
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Tested-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20201210212903.216728-3-krzk@kernel.org

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

@@ -270,7 +270,7 @@
 	pmic@66 {
 		compatible = "samsung,s2mps14-pmic";
 		interrupt-parent = <&gpx0>;
-		interrupts = <7 IRQ_TYPE_NONE>;
+		interrupts = <7 IRQ_TYPE_LEVEL_LOW>;
 		reg = <0x66>;
 		wakeup-source;