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/video/sunxi/sunxi_de2.c b/drivers/video/sunxi/sunxi_de2.c
index adc8a98..b657e16 100644
--- a/drivers/video/sunxi/sunxi_de2.c
+++ b/drivers/video/sunxi/sunxi_de2.c
@@ -21,6 +21,7 @@
 #include <asm/arch/display2.h>
 #include <dm/device-internal.h>
 #include <dm/uclass-internal.h>
+#include <linux/bitops.h>
 #include "simplefb_common.h"
 
 DECLARE_GLOBAL_DATA_PTR;