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/clk/renesas/r8a7796-cpg-mssr.c b/drivers/clk/renesas/r8a7796-cpg-mssr.c
index 253a914..89dc141 100644
--- a/drivers/clk/renesas/r8a7796-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a7796-cpg-mssr.c
@@ -18,6 +18,7 @@
 #include <common.h>
 #include <clk-uclass.h>
 #include <dm.h>
+#include <linux/bitops.h>
 
 #include <dt-bindings/clock/r8a7796-cpg-mssr.h>