drm/amd/display: Skip Invalid Streams from DSC Policy

[ Upstream commit 9afeda04964281e9f708b92c2a9c4f8a1387b46e ]

Streams with invalid new connector state should be elimiated from
dsc policy.

Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>