PCIE_CORE_CTRL
ret = readl_poll_timeout(rockchip->apb_base + PCIE_CORE_CTRL,
val = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL);
readl_poll_timeout(rockchip->apb_base + PCIE_CORE_CTRL,
err = readl_poll_timeout(rockchip->apb_base + PCIE_CORE_CTRL,
status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL);