drm/i915: Don't do edp panel detection in g4x_dp_detect()

drm/i915: Don't do edp panel detection in g4x_dp_detect()

That call was moved to intel_dp_detect() in

commit e330665fce18b4f407b8c7c9058ed727d9e1bba2
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Tue Sep 2 20:03:59 2014 +0100

    drm/i915/dp: Refactor common eDP lid detection

but it seem to have been resurrected in the following commit, probably
due to a wrong merge conflict resolution.

commit f1a631f3602ae5ff01d8fb1859e58cd597d7fd86
Author: Dave Airlie <airlied@redhat.com>
Date:   Mon Sep 1 16:58:12 2014 +1000

    drm/i915: handle G45/GM45 pulse detection connected state.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1447859970-9546-1-git-send-email-ander.conselvan.de.oliveira@intel.com