drm/amd/display: Revert DP2 MST hub triple display fix

[WHY]
Introduces regression with DP2 native displays

[HOW]
Revert the change
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml2/dml2_utils.c

@@ -160,13 +160,6 @@ bool is_dp2p0_output_encoder(const struct pipe_ctx *pipe_ctx)
 
 	if (pipe_ctx->stream == NULL)
 		return false;
-	/* Count MST hubs once by treating only 1st remote sink in topology as an encoder */
-	if (pipe_ctx->stream->link && pipe_ctx->stream->link->remote_sinks[0]) {
-			return (pipe_ctx->stream_res.hpo_dp_stream_enc &&
-				pipe_ctx->link_res.hpo_dp_link_enc &&
-				dc_is_dp_signal(pipe_ctx->stream->signal) &&
-				(pipe_ctx->stream->link->remote_sinks[0] == pipe_ctx->stream->sink));
-	}
 
 	return (pipe_ctx->stream_res.hpo_dp_stream_enc &&
 		pipe_ctx->link_res.hpo_dp_link_enc &&