MIPS: Fix build error due to PTR used in more places

Use PTR_WD instead of PTR to avoid clashes with other parts.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h
index af37885..431a1c9 100644
--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -119,7 +119,7 @@ static inline void flush_scache_line(unsigned long addr)
 	"	j	2b			\n"		\
 	"	.previous			\n"		\
 	"	.section __ex_table,\"a\"	\n"		\
-	"	"STR(PTR)" 1b, 3b		\n"		\
+	"	"STR(PTR_WD)" 1b, 3b		\n"		\
 	"	.previous"					\
 	: "+r" (__err)						\
 	: "i" (op), "r" (addr), "i" (-EFAULT));			\
@@ -142,7 +142,7 @@ static inline void flush_scache_line(unsigned long addr)
 	"	j	2b			\n"		\
 	"	.previous			\n"		\
 	"	.section __ex_table,\"a\"	\n"		\
-	"	"STR(PTR)" 1b, 3b		\n"		\
+	"	"STR(PTR_WD)" 1b, 3b		\n"		\
 	"	.previous"					\
 	: "+r" (__err)						\
 	: "i" (op), "r" (addr), "i" (-EFAULT));			\