drm/i915: Don't register CRT connector when DDI E can't be used
On HSW/BDW DDI A and E share 2 lanes, so when DDI A requires the shared lanes DDI E can't be used. The lanes are not supposed to be dynamically switched between the two uses, so there's no point in registering the CRT connector when DDI E has no lanes. v2: Fix typos in the commit message (Paulo) Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1449005396-15319-1-git-send-email-ville.syrjala@linux.intel.com
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