[MIPS] Declare some pci variables in header file

Declare pci_probe_only, etc. in asm-mips/pci.h file.  This will fix
some sparse warnings.
Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/pci/fixup-vr4133.c

@@ -171,7 +171,6 @@ void i8259_init(void)
 
 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 {
-	extern int pci_probe_only;
 	pci_probe_only = 1;
 
 #ifdef CONFIG_ROCKHOPPER

arch/mips/pci/pci-bcm1480.c

@@ -202,7 +202,6 @@ static int __init bcm1480_pcibios_init(void)
 {
 	uint32_t cmdreg;
 	uint64_t reg;
-	extern int pci_probe_only;
 
 	/* CFE will assign PCI resources */
 	pci_probe_only = 1;

arch/mips/pci/pci-ip27.c

@@ -47,7 +47,6 @@ int __cpuinit bridge_probe(nasid_t nasid, int widget_id, int masterwid)
 	static int num_bridges = 0;
 	bridge_t *bridge;
 	int slot;
-	extern int pci_probe_only;
 
 	pci_probe_only = 1;
 

arch/mips/pci/pci-sb1250.c

@@ -210,7 +210,6 @@ static int __init sb1250_pcibios_init(void)
 	void __iomem *io_map_base;
 	uint32_t cmdreg;
 	uint64_t reg;
-	extern int pci_probe_only;
 
 	/* CFE will assign PCI resources */
 	pci_probe_only = 1;

include/asm-mips/pci.h

@@ -172,4 +172,7 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 	return channel ? 15 : 14;
 }
 
+extern int pci_probe_only;
+extern unsigned int pcibios_max_latency;
+
 #endif /* _ASM_PCI_H */