The types of the arguments length was wrong because it didn't include
the case of SMI_PARAMETERS. Fixing this by reverting to untyped nodes.

Bug: 
Change-Id: Iebc2f1f4530f4f04418a0e200b7bb46938cb456f
Reviewed-on: https://chromium-review.googlesource.com/856981Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50466}