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/board/keymile/common/qrio.c b/board/keymile/common/qrio.c
index 0cb3366..06a4e67 100644
--- a/board/keymile/common/qrio.c
+++ b/board/keymile/common/qrio.c
@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <linux/bitops.h>
 
 #include "common.h"
 #include "qrio.h"