arm64: dts: hi3798cv200: correct PCIe 'bus-range' setting

The PCIe 'bus-range' setting is incorrect and causing the following
message during boot.

pci_bus 0000:01: busn_res: can not insert [bus 01-ff] under [bus 00-0f] (conflicts with (null) [bus 00-0f])

Correct it to get rid of the message.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>