PCI: qcom: Drop unnecessary root_bus_nr setting

Function dw_pcie_host_init() already initializes the root_bus_nr field
of 'struct pcie_port', so the -1 assignment prior to calling
dw_pcie_host_init() in platform specific driver is not really needed.
Drop it.

Signed-off-by: Shawn Guo <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Acked-by: Stanimir Varbanov <[email protected]>

Author: shawnguo2

drivers/pci/controller/dwc/pcie-qcom.c

@@ -1251,7 +1251,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	pp->root_bus_nr = -1;
 	pp->ops = &qcom_pcie_dw_ops;
 
 	if (IS_ENABLED(CONFIG_PCI_MSI)) {