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/i2c/stm32f7_i2c.c b/drivers/i2c/stm32f7_i2c.c
index 18affd0..ada8f40 100644
--- a/drivers/i2c/stm32f7_i2c.c
+++ b/drivers/i2c/stm32f7_i2c.c
@@ -9,6 +9,7 @@
 #include <i2c.h>
 #include <log.h>
 #include <reset.h>
+#include <linux/bitops.h>
 #include <linux/delay.h>
 
 #include <dm/device.h>