orangefs: remove ORANGEFS_READDIR macros

They are clones of the ORANGEFS_ITERATE macros in use elsewhere.  Delete
ORANGEFS_ITERATE_NEXT which is a hack previously used by readdir.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
diff --git a/fs/orangefs/protocol.h b/fs/orangefs/protocol.h
index 971307a..48bcc1b 100644
--- a/fs/orangefs/protocol.h
+++ b/fs/orangefs/protocol.h
@@ -138,13 +138,8 @@ typedef __s64 ORANGEFS_offset;
 #define ORANGEFS_G_SGID    (1 << 10)
 #define ORANGEFS_U_SUID    (1 << 11)
 
-/* definition taken from stdint.h */
-#define INT32_MAX (2147483647)
-#define ORANGEFS_ITERATE_START    (INT32_MAX - 1)
-#define ORANGEFS_ITERATE_END      (INT32_MAX - 2)
-#define ORANGEFS_ITERATE_NEXT     (INT32_MAX - 3)
-#define ORANGEFS_READDIR_START ORANGEFS_ITERATE_START
-#define ORANGEFS_READDIR_END   ORANGEFS_ITERATE_END
+#define ORANGEFS_ITERATE_START    2147483646
+#define ORANGEFS_ITERATE_END      2147483645
 #define ORANGEFS_IMMUTABLE_FL FS_IMMUTABLE_FL
 #define ORANGEFS_APPEND_FL    FS_APPEND_FL
 #define ORANGEFS_NOATIME_FL   FS_NOATIME_FL