drm/amd/display: fix stream setting for diags on silicon

We need to set up stream even with virtual displays when running
diags.

Signed-off-by: Dmytro Laktyushkin <[e-mail]>
Reviewed-by: Eric Bernstein <[e-mail]>
Acked-by: Rodrigo Siqueira <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/display/dc/core/dc_link.c

···
 	enum dc_status status;
 	DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
 
-	if (!IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment) &&
+	if (!IS_DIAG_DC(dc->ctx->dce_environment) &&
 			dc_is_virtual_signal(pipe_ctx->stream->signal))
 		return;
 
···
 	struct dc_stream_state *stream = pipe_ctx->stream;
 	struct dc_link *link = stream->sink->link;
 
-	if (!IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment) &&
+	if (!IS_DIAG_DC(dc->ctx->dce_environment) &&
 			dc_is_virtual_signal(pipe_ctx->stream->signal))
 		return;