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/include/net/pfe_eth/pfe/cbus/emac.h b/include/net/pfe_eth/pfe/cbus/emac.h
index 53db8cc..5dc2113 100644
--- a/include/net/pfe_eth/pfe/cbus/emac.h
+++ b/include/net/pfe_eth/pfe/cbus/emac.h
@@ -7,6 +7,7 @@
 #ifndef _EMAC_H_
 #define _EMAC_H_
 
+#include <linux/bitops.h>
 #define EMAC_IEVENT_REG		0x004
 #define EMAC_IMASK_REG		0x008
 #define EMAC_R_DES_ACTIVE_REG	0x010