drm/nouveau: pass perflvl struct to clock_pre()

On certain boards, there's BIOS scripts and memory timings that need to
be modified with the memclk.  Just pass in the entire perflvl struct and
let the chipset-specific code decide what to do.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.h b/drivers/gpu/drm/nouveau/nouveau_pm.h
index 7504e3b8..babe64a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_pm.h
+++ b/drivers/gpu/drm/nouveau/nouveau_pm.h
@@ -48,12 +48,14 @@
 
 /* nv04_pm.c */
 int nv04_pm_clock_get(struct drm_device *, u32 id);
-void *nv04_pm_clock_pre(struct drm_device *, u32 id, int khz);
+void *nv04_pm_clock_pre(struct drm_device *, struct nouveau_pm_level *,
+			u32 id, int khz);
 void nv04_pm_clock_set(struct drm_device *, void *);
 
 /* nv50_pm.c */
 int nv50_pm_clock_get(struct drm_device *, u32 id);
-void *nv50_pm_clock_pre(struct drm_device *, u32 id, int khz);
+void *nv50_pm_clock_pre(struct drm_device *, struct nouveau_pm_level *,
+			u32 id, int khz);
 void nv50_pm_clock_set(struct drm_device *, void *);
 
 /* nouveau_temp.c */