mtd: mtk-nor: remove duplicated include from mtk-quadspi.c

Remove duplicated include.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/spi-nor/mtk-quadspi.c

@@ -21,7 +21,6 @@
 #include <linux/ioport.h>
 #include <linux/math64.h>
 #include <linux/module.h>
-#include <linux/mtd/mtd.h>
 #include <linux/mutex.h>
 #include <linux/of.h>
 #include <linux/of_device.h>