drm/nouveau/pmu: add msgqueue member

NVIDIA-provided PMU firmware is controlled by a msgqueue. Add a member
to the PMU structure as well as the required cleanup code if this
feature is used.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/subdev/pmu.h

@@ -7,6 +7,7 @@ struct nvkm_pmu {
 	const struct nvkm_pmu_func *func;
 	struct nvkm_subdev subdev;
 	struct nvkm_falcon *falcon;
+	struct nvkm_msgqueue *queue;
 
 	struct {
 		u32 base;

drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c

@@ -23,6 +23,7 @@
  */
 #include "priv.h"
 
+#include <core/msgqueue.h>
 #include <subdev/timer.h>
 
 void
@@ -118,6 +119,7 @@ static void *
 nvkm_pmu_dtor(struct nvkm_subdev *subdev)
 {
 	struct nvkm_pmu *pmu = nvkm_pmu(subdev);
+	nvkm_msgqueue_del(&pmu->queue);
 	nvkm_falcon_del(&pmu->falcon);
 	return nvkm_pmu(subdev);
 }