[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: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/pci.h b/include/asm-mips/pci.h
index 301ff2f..d3be834 100644
--- a/include/asm-mips/pci.h
+++ b/include/asm-mips/pci.h
@@ -172,4 +172,7 @@
 	return channel ? 15 : 14;
 }
 
+extern int pci_probe_only;
+extern unsigned int pcibios_max_latency;
+
 #endif /* _ASM_PCI_H */