drm/radeon: fix typo in radeon_connector_is_dp12_capable()

We were checking the ext clock rather than the display clock.

Noticed by ArtForz on IRC.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2014-05-27 13:11:36 -04:00
commit af5d36539d