mb, soc/intel: Reorganize CNVi device entries in devicetree

mb, soc/intel: Reorganize CNVi device entries in devicetree

This change reorganizes the CNVi device entries in mainboard
devicetree/overridetree and SoC chipset tree to make it consistent
with how other SoC internal PCI devices are represented i.e. without a
chip driver around the SoC controller itself.

Before:
chip drivers/wifi/generic
	register "wake" = "..."
	device pci xx.y on end
end

After:
device pci xx.y on
	chip drivers/wifi/generic
		register "wake" = "..."
		device generic 0 on end
	end
end

Change-Id: I22660047a3afd5994400341de0ca461bbc0634e2
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46865
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>