arm64: dts: imx8mn-var-som: fix missing PMIC's interrupt line pull-up

The PMIC's interrupt is level low and should be pulled up.  The PMIC's
device node had pinctrl-0 property but it lacked pinctrl-names which
is required to apply the pin configuration.  The actual problem in DTS
was pointed out by Felix Radensky from Variscite.
Reported-by: Felix Radensky <felix.r@variscite.com>
Fixes: ade0176d ("arm64: dts: imx8mn-var-som: Add Variscite VAR-SOM-MX8MN System on Module")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Robin Gong <yibin.gong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mn-var-som.dtsi

@@ -116,13 +116,10 @@ &i2c1 {
 	pmic@4b {
 		compatible = "rohm,bd71847";
 		reg = <0x4b>;
+		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_pmic>;
 		interrupt-parent = <&gpio2>;
-		/*
-		 * The interrupt is not correct. It should be level low,
-		 * however with internal pull up this causes IRQ storm.
-		 */
-		interrupts = <8 IRQ_TYPE_EDGE_RISING>;
+		interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
 		rohm,reset-snvs-powered;
 
 		regulators {
@@ -388,7 +385,7 @@ MX8MN_IOMUXC_I2C3_SDA_I2C3_SDA		0x400001c3
 
 	pinctrl_pmic: pmicirqgrp {
 		fsl,pins = <
-			MX8MN_IOMUXC_SD1_DATA6_GPIO2_IO8	0x101
+			MX8MN_IOMUXC_SD1_DATA6_GPIO2_IO8	0x141
 		>;
 	};