[XFS] Remove STATIC which was missing from prior manual merge

Removes STATIC on xfs_freeze function which was not manually
applied for SGI-Modid: xfs-linux-melb:xfs-kern:29504a.

Reviewed-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

fs/xfs/xfs_vfsops.c

@@ -2117,7 +2117,7 @@ xfs_showargs(
  * need to take care of themetadata. Once that's done write a dummy
  * record to dirty the log in case of a crash while frozen.
  */
-STATIC void
+void
 xfs_freeze(
 	xfs_mount_t	*mp)
 {