drm/amd/display: Print seamless boot message in mark_seamless_boot_stream

[WHAT & HOW]
Add a message so users know the stream will be used for seamless boot.

Reviewed-by: Mario Limonciello <[e-mail]>
Reviewed-by: Rodrigo Siqueira <[e-mail]>
Signed-off-by: Alex Hung <[e-mail]>
Signed-off-by: Roman Li <[e-mail]>
Tested-by: Daniel Wheeler <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 {
 	struct dc_bios *dcb = dc->ctx->dc_bios;
 
+	DC_LOGGER_INIT(dc->ctx->logger);
+
 	if (stream->apply_seamless_boot_optimization)
 		return;
 	if (!dc->config.allow_seamless_boot_optimization)
···
 		return;
 	if (dc_validate_boot_timing(dc, stream->sink, &stream->timing)) {
 		stream->apply_seamless_boot_optimization = true;
-		DC_LOG_INFO("Marked stream for seamless boot optimization\n");
+		DC_LOG_DC("Marked stream for seamless boot optimization\n");
 	}
 }