drm/i915: Clarify CHV swing margin/deemph bits

CHV display PHY registes have two swing margin/deemph settings. Make it
clear which ones we're using.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
3 files changed