r600g,radeonsi: create aux_context last

This fixes a regression caused by 68f6dec32e.

src/gallium/drivers/r600/r600_pipe.c

@@ -1134,6 +1134,9 @@ struct pipe_screen *r600_screen_create(struct radeon_winsys *ws)
 		}
 	}
 
+	/* Create the auxiliary context. This must be done last. */
+	rscreen->b.aux_context = rscreen->b.b.context_create(&rscreen->b.b, NULL);
+
 #if 0 /* This is for testing whether aux_context and buffer clearing work correctly. */
 	struct pipe_resource templ = {};
 

src/gallium/drivers/radeon/r600_pipe_common.c

@@ -175,9 +175,7 @@ bool r600_common_screen_init(struct r600_common_screen *rscreen,
 
 	util_format_s3tc_init();
 
-	/* Create the auxiliary context. */
 	pipe_mutex_init(rscreen->aux_context_lock);
-	rscreen->aux_context = rscreen->b.context_create(&rscreen->b, NULL);
 	return true;
 }
 

src/gallium/drivers/radeonsi/radeonsi_pipe.c

@@ -819,5 +819,8 @@ struct pipe_screen *radeonsi_screen_create(struct radeon_winsys *ws)
 	}
 #endif
 
+	/* Create the auxiliary context. This must be done last. */
+	rscreen->b.aux_context = rscreen->b.b.context_create(&rscreen->b.b, NULL);
+
 	return &rscreen->b.b;
 }