arm64: dts: rockchip: Add DTS for FriendlyARM NanoPi R2S Plus

The R2S Plus is basically an R2S with additional eMMC.

The eMMC configuration for the DTS has been extracted and copied from
rk3328-nanopi-r2.dts, v2017.09 branch from the friendlyarm/uboot-rockchip
repository.

Signed-off-by: Sergey Bostandzhyan <jin@mediatomb.cc>
Link: https://lore.kernel.org/r/20240814170048.23816-2-jin@mediatomb.cc
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

[ upstream commit: b8c02878292200ebb5b4a8cfc9dbf227327908bd ]

(cherry picked from commit c9bf98827964441f4dd16faa45bd4046f472e693)
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

dts/upstream/src/arm64/rockchip/rk3328-nanopi-r2s-plus.dts

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * (C) Copyright 2018 FriendlyElec Computer Tech. Co., Ltd.
+ * (http://www.friendlyarm.com)
+ *
+ * (C) Copyright 2016 Rockchip Electronics Co., Ltd
+ */
+
+/dts-v1/;
+#include "rk3328-nanopi-r2s.dts"
+
+/ {
+	compatible = "friendlyarm,nanopi-r2s-plus", "rockchip,rk3328";
+	model = "FriendlyElec NanoPi R2S Plus";
+
+	aliases {
+		mmc1 = &emmc;
+	};
+};
+
+&emmc {
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	disable-wp;
+	mmc-hs200-1_8v;
+	non-removable;
+	num-slots = <1>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&emmc_clk &emmc_cmd &emmc_bus8>;
+	supports-emmc;
+	status = "okay";
+};