arm/PCI: don't export pci_flags

There's no need to export pci_flags; it's not exported by any other
architecture, and no modules reference it.

CC: Rob Herring <[e-mail]>
CC: Russell King <[e-mail]>
CC: [e-mail]
Signed-off-by: Bjorn Helgaas <[e-mail]>
Signed-off-by: Jesse Barnes <[e-mail]>

arch/arm/kernel/bios32.c

···
 		pci_bus_add_devices(bus);
 	}
 }
-EXPORT_SYMBOL(pci_flags);
 
 #ifndef CONFIG_PCI_HOST_ITE8152
 void pcibios_set_master(struct pci_dev *dev)