Prototype-style function definition for wcschr for POWER.  Upstream,
this was part of:

commit 05b5cd1ce51247f986e66b90ad672e89b4b98333
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date:   Mon Oct 14 09:23:12 2013 -0500

    PowerPC: multiarch wcschr for PowerPC32

diff --git a/sysdeps/powerpc/powerpc32/power6/wcschr.c b/sysdeps/powerpc/powerpc32/power6/wcschr.c
index 3b4cca15face81da..70efc574f5a13e5a 100644
--- a/sysdeps/powerpc/powerpc32/power6/wcschr.c
+++ b/sysdeps/powerpc/powerpc32/power6/wcschr.c
@@ -21,9 +21,7 @@
 
 /* Find the first occurrence of WC in WCS.  */
 wchar_t *
-wcschr (wcs, wc)
-     const wchar_t *wcs;
-     const wchar_t wc;
+wcschr (const wchar_t *wcs, const wchar_t wc)
 {
   const wchar_t *wcs2 = wcs + 1;