[PATCH 1/1] riscv: dts: spacemit: Add 'linux,pci-domain' to PCIe nodes for K1

[Chukun Pan]

Hi,

> The SpacemiT K1 SoC has 3 PCIe EP controller nodes. Add the
> 'linux,pci-domain' property to assign a PCI domain number to
> each of the controllers instead of assigning it randomly.

Does anyone have any thoughts on this?
Without this patch, the PCI domain number is random.

```
/# find /sys/devices -name net
/sys/devices/platform/soc/soc:pcie-bus/ca800000.pcie/pci0001:00/0001:00:00.0/0001:01:00.0/net
/sys/devices/platform/soc/soc:pcie-bus/ca400000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/net

/# find /sys/devices -name net
/sys/devices/platform/soc/soc:pcie-bus/ca800000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/net
/sys/devices/platform/soc/soc:pcie-bus/ca400000.pcie/pci0001:00/0001:00:00.0/0001:01:00.0/net
```

Thanks,
Chukun