drm/nouveau/disp/dp: make use of existing output data for link training

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/dport.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/dport.h
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/gm107.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/nv50.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/nv50.h
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/nv84.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/nv94.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/nva0.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/nva3.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/nve0.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/nvf0.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/outpdp.h
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/piornv50.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/sornv94.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/disp/sornvd0.c
Simple merge