drm/amd/display: Populate DP2.0 output type for DML pipe

[Why]
DCN3.2 DML logic uses a new output type for DP2.0,
which will enable validation to pass for higher BW
timings that require DP2.0 link rates.

[How]
Populate the DML pipe with DP2.0 output type if
the signal type of the pipe_ctx is 128b/132b.

Reviewed-by: Alvin Lee <Alvin.Lee2@amd.com>
Acked-by: Jasdeep Dhillon <jasdeep.dhillon@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>