arm64: dts: zii-ultra: Add node for accelerometer

Add I2C node for accelerometer present on both Zest and RMB3 boards.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi

@@ -262,6 +262,18 @@ &i2c1 {
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
 
+	accelerometer@1c {
+		compatible = "fsl,mma8451";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_accel>;
+		reg = <0x1c>;
+		interrupt-parent = <&gpio3>;
+		interrupts = <20 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-names = "INT2";
+		vdd-supply = <&reg_gen_3p3>;
+		vddio-supply = <&reg_gen_3p3>;
+	};
+
 	ucs1002: charger@32 {
 		compatible = "microchip,ucs1002";
 		pinctrl-names = "default";
@@ -522,6 +534,12 @@ &snvs_rtc {
 };
 
 &iomuxc {
+	pinctrl_accel: accelgrp {
+		fsl,pins = <
+			MX8MQ_IOMUXC_SAI5_RXC_GPIO3_IO20		0x41
+		>;
+	};
+
 	pinctrl_fec1: fec1grp {
 		fsl,pins = <
 			MX8MQ_IOMUXC_ENET_MDC_ENET1_MDC			0x3