drm/doc: Fix comment typo

Replace apprpriately with appropriately.

Fixes: 1e4d84c6589e9 ("drm/doc: Polish plane composition property docs")
Signed-off-by: Marek Vasut <[e-mail]>
Cc: Benjamin Gaignard <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Cc: Dmitry Baryshkov <[e-mail]>
Cc: Maxime Ripard <[e-mail]>
Cc: Sean Paul <[e-mail]>
Cc: Simon Ser <[e-mail]>
Cc: Ville Syrjälä <[e-mail]>
Signed-off-by: Simon Ser <[e-mail]>
Reviewed-by: Simon Ser <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/drm_blend.c

···
  *
  * Note that the source rectangle must fully lie within the bounds of the
  * &drm_framebuffer. The destination rectangle can lie outside of the visible
- * area of the current mode of the CRTC. It must be apprpriately clipped by the
+ * area of the current mode of the CRTC. It must be appropriately clipped by the
  * driver, which can be done by calling drm_plane_helper_check_update(). Drivers
  * are also allowed to round the subpixel sampling positions appropriately, but
  * only to the next full pixel. No pixel outside of the source rectangle may