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/pinctrl/mscc/mscc-common.c b/drivers/pinctrl/mscc/mscc-common.c
index 90c54b4..307ed1d 100644
--- a/drivers/pinctrl/mscc/mscc-common.c
+++ b/drivers/pinctrl/mscc/mscc-common.c
@@ -21,6 +21,7 @@
 #include <dm/root.h>
 #include <errno.h>
 #include <fdtdec.h>
+#include <linux/bitops.h>
 #include <linux/io.h>
 #include "mscc-common.h"