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/clk_vexpress_osc.c b/drivers/clk/clk_vexpress_osc.c
index ddfc5f6..b48319b 100644
--- a/drivers/clk/clk_vexpress_osc.c
+++ b/drivers/clk/clk_vexpress_osc.c
@@ -13,6 +13,7 @@
 #include <dm/lists.h>
 #include <errno.h>
 #include <misc.h>
+#include <linux/bitops.h>
 
 #define CLK_FUNCTION		BIT(20)