Comment 35 for bug 542660

Note that this commit has a different sha1 in mainline:

commit 9f998ad7e92a1653b6b396b1278e75560a8be519
Author: Alex Deucher <email address hidden>
Date: Mon Mar 29 21:37:08 2010 -0400

    drm/radeon/kms: minor fixes for eDP with LCD* device tags (v2)

    Some systems have LCD* rather than DFP* device tags in the bios
    for eDP connectors; notably the new apple iMac. This fixes
    things up so eDP connectors with either tag will work.

    v2: fix typo

    Signed-off-by: Alex Deucher <email address hidden>
    Signed-off-by: Dave Airlie <email address hidden>