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/net/fsl_enetc.h b/drivers/net/fsl_enetc.h
index 48c3005..37e7e85 100644
--- a/drivers/net/fsl_enetc.h
+++ b/drivers/net/fsl_enetc.h
@@ -7,6 +7,7 @@
 #ifndef _ENETC_H
 #define _ENETC_H
 
+#include <linux/bitops.h>
 #define enetc_dbg(dev, fmt, args...)	debug("%s:" fmt, dev->name, ##args)
 
 /* PCI function IDs */