drm: drm_rect.h: delete duplicated word in comment

Drop doubled word "the" in a comment.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200715052349.23319-7-rdunlap@infradead.org

include/drm/drm_rect.h

@@ -180,7 +180,7 @@ static inline int drm_rect_height(const struct drm_rect *r)
 }
 
 /**
- * drm_rect_visible - determine if the the rectangle is visible
+ * drm_rect_visible - determine if the rectangle is visible
  * @r: rectangle whose visibility is returned
  *
  * RETURNS: