drm/dp: Clarify automated test constant and add constant for FAUX test pattern
drm/dp: Clarify automated test constant and add constant for FAUX test pattern

  - DP_TEST_LINK_PATTERN is ambiguous, rename to DP_TEST_LINK_VIDEO_PATTERN to clarify
  - Added DP_TEST_LINK_FAUX_PATTERN to support automated testing of Fast AUX

Signed-off-by: Todd Previte <7c35167087125e218d92ade7e6519b3dfc3b9d1a@gmail.com>
Reviewed-by: Jani Nikula <ba783f3beccaedfda693f41a15407d612a629408@intel.com>
Signed-off-by: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs