ARM: mstar: Add dts for msc313(e) based BreadBee boards

BreadBee is an opensource development board based on the
MStar msc313(e) SoC.

Hardware details, schematics and so on can be found at:
https://github.com/breadbee/breadbee

Signed-off-by: Daniel Palmer <[e-mail]>
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/arm/boot/dts/Makefile

···
 	mt8127-moose.dtb \
 	mt8135-evbp1.dtb
 dtb-$(CONFIG_ARCH_MILBEAUT) += milbeaut-m10v-evb.dtb
+dtb-$(CONFIG_ARCH_MSTARV7) += \
+	infinity-msc313-breadbee_crust.dtb \
+	infinity3-msc313e-breadbee.dtb
 dtb-$(CONFIG_ARCH_ZX) += zx296702-ad1.dtb
 dtb-$(CONFIG_ARCH_ASPEED) += \
 	aspeed-ast2500-evb.dtb \

arch/arm/boot/dts/infinity-msc313-breadbee_crust.dts

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 thingy.jp.
+ * Author: Daniel Palmer <[e-mail]>
+ */
+
+/dts-v1/;
+#include "infinity-msc313.dtsi"
+
+/ {
+	model = "BreadBee Crust";
+	compatible = "thingyjp,breadbee-crust", "mstar,infinity";
+
+	aliases {
+		serial0 = &pm_uart;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&pm_uart {
+	status = "okay";
+};

arch/arm/boot/dts/infinity3-msc313e-breadbee.dts

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 thingy.jp.
+ * Author: Daniel Palmer <[e-mail]>
+ */
+
+/dts-v1/;
+#include "infinity3-msc313e.dtsi"
+
+/ {
+	model = "BreadBee";
+	compatible = "thingyjp,breadbee", "mstar,infinity3";
+
+	aliases {
+		serial0 = &pm_uart;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&pm_uart {
+	status = "okay";
+};