arm64: dts: nuvoton: Add initial NPCM845 EVB device tree

Add initial Nuvoton NPCM845 evaluation board device tree.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>