drm/nouveau/mxm: silence output if no bios data

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/subdev/mxm/base.c

@@ -260,7 +260,7 @@ nouveau_mxm_create_(struct nouveau_object *parent,
 
 	data = mxm_table(bios, &ver, &len);
 	if (!data || !(ver = nv_ro08(bios, data))) {
-		nv_info(mxm, "no VBIOS data, nothing to do\n");
+		nv_debug(mxm, "no VBIOS data, nothing to do\n");
 		return 0;
 	}