ia64: fix compilation warnings introduced by commit v4.7-174-g44f0ed1

* linux/ia64/syscallent.h: Undefine sys_oldlstat, sys_lstat and
sys_lstat64 before redefining them to printargs.

Reported-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/linux/ia64/syscallent.h b/linux/ia64/syscallent.h
index 4065b01..b76efff 100644
--- a/linux/ia64/syscallent.h
+++ b/linux/ia64/syscallent.h
@@ -70,6 +70,7 @@
 #define sys_getgroups		printargs
 #define sys_setgroups		printargs
 #define sys_select		printargs
+#undef sys_oldlstat
 #define sys_oldlstat		printargs
 #define sys_readdir		printargs
 #define sys_profil		printargs
@@ -79,6 +80,7 @@
 #define sys_setitimer		printargs
 #define sys_getitimer		printargs
 #define sys_stat		printargs
+#undef sys_lstat
 #define sys_lstat		printargs
 #define sys_fstat		printargs
 #define sys_olduname		printargs
@@ -122,6 +124,7 @@
 #define sys_truncate64		printargs
 #define sys_ftruncate64		printargs
 #define sys_stat64		printargs
+#undef sys_lstat64
 #define sys_lstat64		printargs
 #define sys_fstat64		printargs
 #define sys_fcntl64		printargs