[ 71/73] drm/radeon: on hotplug force link training to happen (v2)

3.2-stable review patch. If anyone has any objections, please let me know. -- From: Jerome Glisse commit ca2ccde5e2f24a792caa4cca919fc5c6f65d1887 upstream. To have DP behave like VGA/DVI we need to retrain the link on hotplug. For this to happen we need to force link training

[ 71/73] drm/radeon: on hotplug force link training to happen (v2)

3.2-stable review patch. If anyone has any objections, please let me know. -- From: Jerome Glisse jgli...@redhat.com commit ca2ccde5e2f24a792caa4cca919fc5c6f65d1887 upstream. To have DP behave like VGA/DVI we need to retrain the link on hotplug. For this to happen we need to