[MIPS] Namespace clean-up in arch/mips/pci/pci.c

The following symbols

	hose_head
	hose_tail

are needlessly defined global in arch/mips/pci/pci.c, and
this patch makes them static.

The variable pci_isa_hose is not used, and is removed by
this patch.

Spotted by namespacecheck. Tested by booting a Malta 4Kc
board up to the shell prompt.
Signed-off-by: NDmitri Vorobiev <dmitri.vorobiev@movial.fi>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/pci/pci.c

@@ -29,8 +29,7 @@ unsigned int pci_probe = PCI_ASSIGN_ALL_BUSSES;
  * The PCI controller list.
  */
 
-struct pci_controller *hose_head, **hose_tail = &hose_head;
-struct pci_controller *pci_isa_hose;
+static struct pci_controller *hose_head, **hose_tail = &hose_head;
 
 unsigned long PCIBIOS_MIN_IO	= 0x0000;
 unsigned long PCIBIOS_MIN_MEM	= 0;