MIPS: Remove dead code in pci.h

This code has been marked dead for more than 10 years. Seems no need to
keep it now.
Signed-off-by: NJason Yan <yanaijie@huawei.com>
Signed-off-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/include/asm/mach-rc32434/pci.h

@@ -319,9 +319,6 @@ struct pci_msu {
 #define PCIM_H_EA		0x3
 #define PCIM_H_IA_FIX		0x4
 #define PCIM_H_IA_RR		0x5
-#if 0
-#define PCI_ADDR_START		0x13000000
-#endif
 
 #define PCI_ADDR_START		0x50000000