media: imx: imx7-media-csi: Remove a useless include

<linux/gcd.h> is not needed for this driver. Remove the corresponding
 #include.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/imx/imx7-media-csi.c

@@ -8,7 +8,6 @@
 
 #include <linux/clk.h>
 #include <linux/delay.h>
-#include <linux/gcd.h>
 #include <linux/interrupt.h>
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>