treewide: Fix typo compatability -> compatibility

Even though 'compatability' has a dedicated entry in the Wiktionary,
it's listed as 'Mispelling of compatibility'. Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> for the atomic_helper.c
Signed-off-by: Jiri Kosina <jkosina@suse.com>
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index aac2122..a420c66 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -744,7 +744,7 @@
  * This function shuts down all the outputs that need to be shut down and
  * prepares them (if required) with the new mode.
  *
- * For compatability with legacy crtc helpers this should be called before
+ * For compatibility with legacy crtc helpers this should be called before
  * drm_atomic_helper_commit_planes(), which is what the default commit function
  * does. But drivers with different needs can group the modeset commits together
  * and do the plane commits at the end. This is useful for drivers doing runtime
@@ -769,7 +769,7 @@
  * This function enables all the outputs with the new configuration which had to
  * be turned off for the update.
  *
- * For compatability with legacy crtc helpers this should be called after
+ * For compatibility with legacy crtc helpers this should be called after
  * drm_atomic_helper_commit_planes(), which is what the default commit function
  * does. But drivers with different needs can group the modeset commits together
  * and do the plane commits at the end. This is useful for drivers doing runtime