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/ram/rockchip/dmc-rk3368.c b/drivers/ram/rockchip/dmc-rk3368.c
index 31a3c83..92457a1 100644
--- a/drivers/ram/rockchip/dmc-rk3368.c
+++ b/drivers/ram/rockchip/dmc-rk3368.c
@@ -20,6 +20,7 @@
 #include <asm/arch-rockchip/ddr_rk3368.h>
 #include <asm/arch-rockchip/sdram.h>
 #include <asm/arch-rockchip/sdram_rk3288.h>
+#include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/err.h>