media: imx: allow to build with COMPILE_TEST

Allow building this driver for other platforms under COMPILE_TEST.
Suggested-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/imx/Kconfig

 config VIDEO_IMX_MEDIA
 	tristate "i.MX5/6 V4L2 media core driver"
-	depends on MEDIA_CONTROLLER && VIDEO_V4L2 && ARCH_MXC && IMX_IPUV3_CORE
+	depends on ARCH_MXC || COMPILE_TEST
+	depends on MEDIA_CONTROLLER && VIDEO_V4L2 && IMX_IPUV3_CORE
 	depends on VIDEO_V4L2_SUBDEV_API
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_FWNODE