common: Drop linux/bitops.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index 32938a8..897d001 100644
--- a/fs/ubifs/lpt_commit.c
+++ b/fs/ubifs/lpt_commit.c
@@ -20,6 +20,7 @@
 #include <linux/slab.h>
 #include <linux/random.h>
 #else
+#include <linux/bitops.h>
 #include <linux/compat.h>
 #include <linux/err.h>
 #include "crc16.h"