raspi: should vc fixups update properties of existing nodes?

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the function `rpi_vc_fdt_parse` in arch/arm/boards/raspberry-pi/rpi-common.c registers multiple fixups that take over nodes from the video core device tree. These fixups make use of the `of_copy_property` function to copy the properties of the respective node. In the case of already existing nodes (and properties), this function duplicates the properties instead of updating them.

If the intention is to not override existing properties, one should probably check for the existence of each property before copying to avoid kernel warnings and misconfiguration due to duplicate properties.

If existing properties are supposed to be updated, this could be achieved by switching to `of_set_property` (or something similar). Note that this notion of overriding properties also exists in video core, see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/broadcom/bcm2711.dtsi?h=v6.8#n412 for an example.

I would be glad to submit a patch for either case.



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