PCI: tegra: Remove unused struct tegra_pcie.num_ports field

The num_ports field of the tegra_pcie structure is never used so remove it.
Signed-off-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>

drivers/pci/host/pci-tegra.c

@@ -295,7 +295,6 @@ struct tegra_pcie {
 	struct tegra_msi msi;
 
 	struct list_head ports;
-	unsigned int num_ports;
 	u32 xbar_config;
 
 	struct regulator_bulk_data *supplies;