media: v4l2-async: Fix trivial documentation typo

Fix the incorrect spelling asyncrhronous as asynchronous, which is
visible in the public documentation of enum v4l2_async_match_type.

Fixes: ab4f5a4afc ("[media] v4l2-async: document the remaining stuff")
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

include/media/v4l2-async.h

@@ -27,7 +27,7 @@ struct v4l2_async_notifier;
  * @V4L2_ASYNC_MATCH_I2C: Match will check for I2C adapter ID and address
  * @V4L2_ASYNC_MATCH_FWNODE: Match will use firmware node
  *
- * This enum is used by the asyncrhronous sub-device logic to define the
+ * This enum is used by the asynchronous sub-device logic to define the
  * algorithm that will be used to match an asynchronous device.
  */
 enum v4l2_async_match_type {