drm/i915/tc: Clear DKL_TX_PMD_LANE_SUS before program voltage swing
This sequence was recently added to fix internal HW sequences to reset TC ports. HSDES: 1507287614 HSDES: 14010071447 BSpec: 49292 Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com> Cc: Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191021223408.87344-1-jose.souza@intel.com
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