pci: pcie_dw_rockchip: Disable unused BARs of the root complex

The Root Complex BARs default to claim the full 1 GiB memory region on
RK3568, leaving no space for any attached device.

Fix this by disable the unused BAR 0 and BAR 1 of the RC.

Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
[jonas@kwiboo.se: Move to rk_pcie_configure and use PCI_BASE_ADDRESS_0/1 const]
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>