drm/i915: Demote unknown param to DRM_DEBUG

It's not terribly interesting to know that a parameter doesn't exist,
and it can get in the way of interesting messages, especially with the
staggered VECS merging as we've done.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 03ee193..22534c3 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1002,8 +1002,7 @@
 		value = 1;
 		break;
 	default:
-		DRM_DEBUG_DRIVER("Unknown parameter %d\n",
-				 param->param);
+		DRM_DEBUG("Unknown parameter %d\n", param->param);
 		return -EINVAL;
 	}