media: platform: imx-mipi-csis: Remove unneeded 'default n'

There is no need to pass 'default n' in Kconfig, as by default the
CONFIG_VIDEO_IMX_MIPI_CSIS option is not selected.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/nxp/Kconfig

@@ -11,7 +11,6 @@ config VIDEO_IMX_MIPI_CSIS
 	select MEDIA_CONTROLLER
 	select V4L2_FWNODE
 	select VIDEO_V4L2_SUBDEV_API
-	default n
 	help
 	  Video4Linux2 sub-device driver for the MIPI CSI-2 CSIS receiver
 	  v3.3/v3.6.3 found on some i.MX7 and i.MX8 SoCs.