spi/rockchip: remove duplicated include from spi-rockchip.c

Remove duplicated include.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi-rockchip.c

@@ -26,7 +26,6 @@
 #include <linux/of.h>
 #include <linux/pm_runtime.h>
 #include <linux/io.h>
-#include <linux/scatterlist.h>
 #include <linux/dmaengine.h>
 
 #define DRIVER_NAME "rockchip-spi"