drm: Few typo fixes

s/instatiated/instantiated/
s/unreference/unreferenced/
Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210318103739.27849-1-unixbhaskar@gmail.com

drivers/gpu/drm/drm_property.c

@@ -43,7 +43,7 @@
  * property types and ranges.
  *
  * Properties don't store the current value directly, but need to be
- * instatiated by attaching them to a &drm_mode_object with
+ * instantiated by attaching them to a &drm_mode_object with
  * drm_object_attach_property().
  *
  * Property values are only 64bit. To support bigger piles of data (like gamma
@@ -644,7 +644,7 @@ EXPORT_SYMBOL(drm_property_blob_get);
  * @id: id of the blob property
  *
  * If successful, this takes an additional reference to the blob property.
- * callers need to make sure to eventually unreference the returned property
+ * callers need to make sure to eventually unreferenced the returned property
  * again, using drm_property_blob_put().
  *
  * Return: