dt-bindings: riscv: Add Allwinner D1/D1s board compatibles

dt-bindings: riscv: Add Allwinner D1/D1s board compatibles

Several SoMs and boards are available that feature the Allwinner D1 or
D1s SoC. Document their compatible strings.

Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230126045738.47903-4-samuel@sholland.org
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>