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/nv04_pm.c b/drivers/gpu/drm/nouveau/nv04_pm.c
index 61ca927..6a6eb69 100644
--- a/drivers/gpu/drm/nouveau/nv04_pm.c
+++ b/drivers/gpu/drm/nouveau/nv04_pm.c
@@ -39,7 +39,8 @@
 }
 
 void *
-nv04_pm_clock_pre(struct drm_device *dev, u32 id, int khz)
+nv04_pm_clock_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl,
+		  u32 id, int khz)
 {
 	struct nv04_pm_state *state;
 	int ret;