ARM: dts: mstar: Add a dts for M5Stack UnitV2

M5Stack are releasing a new widget based on the
SigmaStar SSD202D. We have some support for the
SSD202D so lets add a dts for it.

Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Link: https://m5stack-store.myshopify.com/products/unitv2-ai-camera-gc2145
Link: https://lore.kernel.org/r/20210417011015.2105280-4-daniel@0x0f.com'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/Makefile

@@ -1406,6 +1406,7 @@ dtb-$(CONFIG_ARCH_MILBEAUT) += milbeaut-m10v-evb.dtb
 dtb-$(CONFIG_ARCH_MSTARV7) += \
 	mstar-infinity-msc313-breadbee_crust.dtb \
 	mstar-infinity2m-ssd202d-ssd201htv2.dtb \
+	mstar-infinity2m-ssd202d-unitv2.dtb \
 	mstar-infinity3-msc313e-breadbee.dtb \
 	mstar-mercury5-ssc8336n-midrived08.dtb
 dtb-$(CONFIG_ARCH_ASPEED) += \

arch/arm/boot/dts/mstar-infinity2m-ssd202d-unitv2.dts

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2021 thingy.jp.
+ * Author: Daniel Palmer <daniel@thingy.jp>
+ */
+
+/dts-v1/;
+#include "mstar-infinity2m-ssd202d.dtsi"
+
+/ {
+	model = "UnitV2";
+	compatible = "m5stack,unitv2", "mstar,infinity2m";
+
+	aliases {
+		serial0 = &pm_uart;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&pm_uart {
+	status = "okay";
+};