fs/dax.c: fix typo in #endif comment

Fix typo s/CONFIG_TRANSPARENT_HUGEPAGES/CONFIG_TRANSPARENT_HUGEPAGE/ in
#endif comment introduced by commit 2b26a9206d6a ("dax: add huge page
fault support").

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/dax.c b/fs/dax.c
index 15f8ffc..2deed64 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -644,7 +644,7 @@
 	return result;
 }
 EXPORT_SYMBOL_GPL(dax_pmd_fault);
-#endif /* CONFIG_TRANSPARENT_HUGEPAGES */
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 
 /**
  * dax_pfn_mkwrite - handle first write to DAX page