sh/PCI: factor out pcibios_setup()

The PCI core provides a generic pcibios_setup() routine.  Drop this
architecture-specific version in favor of that.
Tested-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

arch/sh/drivers/pci/pci.c

@@ -197,11 +197,6 @@ void __init pcibios_update_irq(struct pci_dev *dev, int irq)
 	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
 }
 
-char * __devinit __weak pcibios_setup(char *str)
-{
-	return str;
-}
-
 static void __init
 pcibios_bus_report_status_early(struct pci_channel *hose,
 				int top_bus, int current_bus,