drm/amd/display: Ext displays with dock can't recognized after resume
[Why] Needs to set the default value of the LTTPR timeout after resume. [How] Set the default (3.2ms) timeout at resuming if the sink supports LTTPR Reviewed-by: NJerry Zuo <Jerry.Zuo@amd.com> Acked-by: NQingqing Zhuo <qingqing.zhuo@amd.com> Signed-off-by: NRyan Lin <tsung-hua.lin@amd.com> Tested-by: NDaniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
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