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/soc/ti/keystone_serdes.c b/drivers/soc/ti/keystone_serdes.c
index 7907e6f..2ece1a8 100644
--- a/drivers/soc/ti/keystone_serdes.c
+++ b/drivers/soc/ti/keystone_serdes.c
@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <common.h>
 #include <asm/ti-common/keystone_serdes.h>
+#include <linux/bitops.h>
 
 #define SERDES_CMU_REGS(x)		(0x0000 + (0x0c00 * (x)))
 #define SERDES_LANE_REGS(x)		(0x0200 + (0x200 * (x)))