drm/nouveau/pmu: instanciate the falcon in PMU device

Have an instance of nvkm_falcon in the PMU structure, ready to be used
by other subdevs (i.e. secboot).
Signed-off-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

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

 #ifndef __NVKM_PMU_H__
 #define __NVKM_PMU_H__
 #include <core/subdev.h>
+#include <engine/falcon.h>
 
 struct nvkm_pmu {
 	const struct nvkm_pmu_func *func;
 	struct nvkm_subdev subdev;
+	struct nvkm_falcon *falcon;
 
 	struct {
 		u32 base;

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

@@ -116,6 +116,8 @@ nvkm_pmu_init(struct nvkm_subdev *subdev)
 static void *
 nvkm_pmu_dtor(struct nvkm_subdev *subdev)
 {
+	struct nvkm_pmu *pmu = nvkm_pmu(subdev);
+	nvkm_falcon_del(&pmu->falcon);
 	return nvkm_pmu(subdev);
 }
 
@@ -136,7 +138,7 @@ nvkm_pmu_ctor(const struct nvkm_pmu_func *func, struct nvkm_device *device,
 	pmu->func = func;
 	INIT_WORK(&pmu->recv.work, nvkm_pmu_recv);
 	init_waitqueue_head(&pmu->recv.wait);
-	return 0;
+	return nvkm_falcon_v1_new(&pmu->subdev, "PMU", 0x10a000, &pmu->falcon);
 }
 
 int