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/drivers/usb/cdns3/drd.h b/drivers/usb/cdns3/drd.h
index 815b93f..fffda7b 100644
--- a/drivers/usb/cdns3/drd.h
+++ b/drivers/usb/cdns3/drd.h
@@ -9,6 +9,7 @@
 #ifndef __LINUX_CDNS3_DRD
 #define __LINUX_CDNS3_DRD
 
+#include <linux/bitops.h>
 #include <linux/types.h>
 #include <linux/usb/otg.h>
 #include "core.h"