drm: Fix scaling_mode docs

Fix the bad copy-pasta in the scaling_mode docs.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210915142300.15631-1-ville.syrjala@linux.intel.comReviewed-by: Simon Ser <contact@emersion.fr>

drivers/gpu/drm/drm_connector.c

@@ -1620,7 +1620,7 @@ EXPORT_SYMBOL(drm_mode_create_tv_properties);
  * connectors.
  *
  * Atomic drivers should use drm_connector_attach_scaling_mode_property()
- * instead to correctly assign &drm_connector_state.picture_aspect_ratio
+ * instead to correctly assign &drm_connector_state.scaling_mode
  * in the atomic state.
  */
 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
@@ -1740,7 +1740,7 @@ EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property);
  * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
  *
  * This is used to add support for scaling mode to atomic drivers.
- * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio
+ * The scaling mode will be set to &drm_connector_state.scaling_mode
  * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
  *
  * This is the atomic version of drm_mode_create_scaling_mode_property().