media: v4l: add missing MODULE_DESCRIPTION() macros

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/media/v4l2-core/v4l2-async.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/media/v4l2-core/v4l2-fwnode.o

Add the missing invocations of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/v4l2-core/v4l2-async.c

@@ -972,4 +972,5 @@ module_exit(v4l2_async_exit);
 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
 MODULE_AUTHOR("Sakari Ailus <sakari.ailus@linux.intel.com>");
 MODULE_AUTHOR("Ezequiel Garcia <ezequiel@collabora.com>");
+MODULE_DESCRIPTION("V4L2 asynchronous subdevice registration API");
 MODULE_LICENSE("GPL");

drivers/media/v4l2-core/v4l2-fwnode.c

@@ -1251,6 +1251,7 @@ int v4l2_async_register_subdev_sensor(struct v4l2_subdev *sd)
 }
 EXPORT_SYMBOL_GPL(v4l2_async_register_subdev_sensor);
 
+MODULE_DESCRIPTION("V4L2 fwnode binding parsing library");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Sakari Ailus <sakari.ailus@linux.intel.com>");
 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");