drm/nouveau/pm/nv40: rename pcounter domains to 'pc' instead of 'pm'

This trivial patch makes thing more consistent since hardware signals
names are prefixed by 'pcXX'.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/engine/pm/nv40.c

@@ -108,7 +108,7 @@ nv40_pm_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 	if (ret)
 		return ret;
 
-	ret = nvkm_perfdom_new(&priv->base, "pm", 0, 0, 0, 4, mclass->doms);
+	ret = nvkm_perfdom_new(&priv->base, "pc", 0, 0, 0, 4, mclass->doms);
 	if (ret)
 		return ret;