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/reset/reset-mtmips.c b/drivers/reset/reset-mtmips.c
index a79a4ac..bc20e33 100644
--- a/drivers/reset/reset-mtmips.c
+++ b/drivers/reset/reset-mtmips.c
@@ -11,6 +11,7 @@
 #include <log.h>
 #include <malloc.h>
 #include <reset-uclass.h>
+#include <linux/bitops.h>
 #include <linux/io.h>
 
 struct mtmips_reset_priv {