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/adc/stm32-adc.c b/drivers/adc/stm32-adc.c
index 140ddce..b12f894 100644
--- a/drivers/adc/stm32-adc.c
+++ b/drivers/adc/stm32-adc.c
@@ -10,6 +10,7 @@
 #include <adc.h>
 #include <asm/io.h>
 #include <dm/device_compat.h>
+#include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/iopoll.h>
 #include "stm32-adc-core.h"