sunxi: dts: arm: add T113s/D1 DT files from Linux-v6.6-rc6

This copies in some devicetree files from the official Linux kernel tree,
v6.6-rc6. It covers a board with the Allwinner T113s SoC, which shares
many devices with its RISC-V sibling, the Allwinner D1(s). This is the
reason for the core .dtsi files landing in the arch/riscv directory.

We are only adjusting the include path to accommodate for the differences
in the U-Boot build system.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
diff --git a/arch/riscv/dts/sunxi-d1-t113.dtsi b/arch/riscv/dts/sunxi-d1-t113.dtsi
new file mode 100644
index 0000000..b715612
--- /dev/null
+++ b/arch/riscv/dts/sunxi-d1-t113.dtsi
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: (GPL-2.0+ or MIT)
+// Copyright (C) 2021-2022 Samuel Holland <samuel@sholland.org>
+
+/ {
+	soc {
+		dsp_wdt: watchdog@1700400 {
+			compatible = "allwinner,sun20i-d1-wdt";
+			reg = <0x1700400 0x20>;
+			interrupts = <SOC_PERIPHERAL_IRQ(122) IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&dcxo>, <&rtc CLK_OSC32K>;
+			clock-names = "hosc", "losc";
+			status = "reserved";
+		};
+	};
+};