ARM: dts: rockchip: Add Edgeble Neural Compute Module 2(Neu2) IO board

Neural Compute Module 2(Neu2) IO board is an industrial form factor
evaluation board from Edgeble AI.

General features:
- microSD slot
- MIPI DSI connector
- 2x USB Host
- 1x USB OTG
- Ethernet
- mini PCIe
- Onboard PoE
- RS485, RS232, CAN
- Micro Phone array
- Speaker
- RTC battery slot
- 40-pin expansion

Neu2 needs to mount on top of this IO board in order to create complete
Edgeble Neural Compute Module 2(Neu2) IO platform.

Add support for it.
Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Link: https://lore.kernel.org/r/20221129075424.189655-9-jagan@edgeble.aiSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/Makefile

@@ -1127,6 +1127,7 @@ dtb-$(CONFIG_ARCH_RENESAS) += \
 dtb-$(CONFIG_ARCH_ROCKCHIP) += \
 	rv1108-elgin-r1.dtb \
 	rv1108-evb.dtb \
+	rv1126-edgeble-neu2-io.dtb \
 	rk3036-evb.dtb \
 	rk3036-kylin.dtb \
 	rk3066a-bqcurie2.dtb \

arch/arm/boot/dts/rv1126-edgeble-neu2-io.dts

+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2020 Rockchip Electronics Co., Ltd.
+ * Copyright (c) 2022 Edgeble AI Technologies Pvt. Ltd.
+ */
+
+/dts-v1/;
+#include "rv1126.dtsi"
+#include "rv1126-edgeble-neu2.dtsi"
+
+/ {
+	model = "Edgeble Neu2 IO Board";
+	compatible = "edgeble,neural-compute-module-2-io",
+		     "edgeble,neural-compute-module-2", "rockchip,rv1126";
+
+	aliases {
+		serial2 = &uart2;
+	};
+
+	chosen {
+		stdout-path = "serial2:1500000n8";
+	};
+};
+
+&sdmmc {
+	bus-width = <4>;
+	cap-mmc-highspeed;
+	cap-sd-highspeed;
+	card-detect-delay = <200>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_bus4 &sdmmc0_det>;
+	rockchip,default-sample-phase = <90>;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr104;
+	vqmmc-supply = <&vccio_sd>;
+	status = "okay";
+};
+
+&uart2 {
+	status = "okay";
+};