data-loop: always acquire rt priority

Always set the thread to rt priority when starting. We can then remove
the code to trigger this from the context.

src/pipewire/context.c

@@ -411,8 +411,6 @@ struct pw_context *pw_context_new(struct pw_loop *main_loop,
 	pw_data_loop_invoke(this->data_loop_impl,
 			do_data_loop_setup, 0, NULL, 0, false, this);
 
-	context_set_freewheel(this, false);
-
 	pw_settings_expose(this);
 
 	pw_log_debug("%p: created", this);

src/pipewire/data-loop.c

@@ -211,6 +211,7 @@ int pw_data_loop_start(struct pw_data_loop *loop)
 			loop->running = false;
 			return -errno;
 		}
+		spa_thread_utils_acquire_rt(utils, thr, -1);
 	}
 	return 0;
 }