pw_multisink: Add module config argument
pw_multisink: Add module config argument

No-Docs-Update-Reason: Update BUILD.gn structure, no functional changes.
Change-Id: I837d521eb5316aec1b675181cb1088f7b1bb8bc6
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/49761
Commit-Queue: Prashanth Swaminathan <7074f112da8ec89069105f3b18a4ce46a4722488@google.com>
Reviewed-by: Armando Montanez <97ef6fdb231c129ac8827d9f0c4106bfbf57f74f@google.com>

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed