arm64: dts: microchip: align SPI NOR node name with dtschema

The node names should be generic and SPI NOR dtschema expects "flash".

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20220407143223.295344-2-krzysztof.kozlowski@linaro.org

arm64: dts: sparx5: Add spi-nand devices

This patch add spi-nand DT nodes to the applicable Sparx5 boards.

Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
Link: https://lore.kernel.org/r/20200824203010.2033-7-lars.povlsen@microchip.com