drm/i915: Use POSTING_READ() in intel_sdvo_write_sdvox()

Use POSTING_READ() in intel_sdvo_write_sdvox() as appropriate.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1 file changed