sim: drop WITH_ENGINE define

We enable this everywhere already, and all new ports should use the
engine logic, so no point in making it an option to disable.

sim/common/ChangeLog

@@ -1,3 +1,8 @@
+2015-12-25  Mike Frysinger  <vapier@gentoo.org>
+
+	* sim-config.h (WITH_ENGINE): Delete.
+	* sim-module.c (modules): Always include sim_engine_install.
+
 2015-12-25  Mike Frysinger  <vapier@gentoo.org>
 
 	* Make-common.in (SIM_NEW_COMMON_OBJS): Add sim-model.o.

sim/common/sim-config.h

@@ -454,19 +454,6 @@ extern int current_floating_point;
 #endif
 
 
-
-/* Engine module.
-
-   Use the common start/stop/restart framework (sim-engine).
-   Simulators using the other modules but not the engine should define
-   WITH_ENGINE=0. */
-
-#ifndef WITH_ENGINE
-#define WITH_ENGINE			1
-#endif
-
-
-
 /* Debugging:
 
    Control the inclusion of debugging code.

sim/common/sim-module.c

@@ -41,9 +41,7 @@ static MODULE_INSTALL_FN * const modules[] = {
   standard_install,
   sim_events_install,
   sim_model_install,
-#if WITH_ENGINE
   sim_engine_install,
-#endif
 #if WITH_TRACE_ANY_P
   trace_install,
 #endif