drm/nouveau: use drm debug levels

- Use driver level (0x2) for NV_DEBUG instead of all levels
- Create a NV_DEBUG_KMS for KMS level (0x4) and use them in modesetting code
- Remove a few odd NV_TRACE calls and replace some of them with NV_DEBUG_KMS or
NV_INFO

Signed-off-by: Maarten Maathuis <madman2003@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
index 36e8c5e..489d492 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -347,7 +347,7 @@
 int
 nouveau_fbcon_probe(struct drm_device *dev)
 {
-	NV_DEBUG(dev, "\n");
+	NV_DEBUG_KMS(dev, "\n");
 
 	return drm_fb_helper_single_fb_probe(dev, 32, nouveau_fbcon_create);
 }