ARM: dts: socfpga: remove non-existent DAC from CycloneV devkit

ARM: dts: socfpga: remove non-existent DAC from CycloneV devkit

There is no Rohm DAC on the CycloneV devkit according to the online
documentation for it that I could find, and it definitely does not have
a dh2228fv as this device does not actually exist! Remove the DAC node
from the devicetree as it is not acceptable to pretend to have a device
on a board in order to bind the spidev driver in Linux.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240717-partake-antivirus-3347e415fb7d@spud
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>