tile/PCI: factor out pcibios_setup()

The PCI core provides a generic pcibios_setup() routine.  Drop this
architecture-specific version in favor of that.

Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

arch/tile/kernel/pci.c

@@ -400,16 +400,6 @@ void pcibios_set_master(struct pci_dev *dev)
 	/* No special bus mastering setup handling. */
 }
 
-/*
- * This can be called from the generic PCI layer, but doesn't need to
- * do anything.
- */
-char __devinit *pcibios_setup(char *str)
-{
-	/* Nothing needs to be done. */
-	return str;
-}
-
 /*
  * This is called from the generic Linux layer.
  */