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>