dt-bindings: arm: Convert Axis board/soc bindings to json-schema

dt-bindings: arm: Convert Axis board/soc bindings to json-schema

Convert Axis SoC bindings to DT schema format using json-schema.
Existing bindings supports ARTPEC-6 SoC and board.

Signed-off-by: SungMin Park <smn1196@coasia.com>
Signed-off-by: SeonGu Kang <ksk4725@coasia.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Ravi Patel <ravi.patel@samsung.com>
Link: https://lore.kernel.org/r/20250825114436.46882-7-ravi.patel@samsung.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>