PCI: xgene: Removed unused ".bus_shift" initialisers from pci-xgene.c

Removed unused ".bus_shift" initialisers from pci-xgene.c as
xgene_pcie_map_bus() did not use these.
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20201129230743.3006978-6-kw@linux.comSigned-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/controller/pci-xgene.c

@@ -257,7 +257,6 @@ static int xgene_v1_pcie_ecam_init(struct pci_config_window *cfg)
 }
 
 const struct pci_ecam_ops xgene_v1_pcie_ecam_ops = {
-	.bus_shift	= 16,
 	.init		= xgene_v1_pcie_ecam_init,
 	.pci_ops	= {
 		.map_bus	= xgene_pcie_map_bus,
@@ -272,7 +271,6 @@ static int xgene_v2_pcie_ecam_init(struct pci_config_window *cfg)
 }
 
 const struct pci_ecam_ops xgene_v2_pcie_ecam_ops = {
-	.bus_shift	= 16,
 	.init		= xgene_v2_pcie_ecam_init,
 	.pci_ops	= {
 		.map_bus	= xgene_pcie_map_bus,