roll: third_party/pigweed 2 commits

74612309f33820a pw_log: Remove backend multiplexer
5880c31b48ea299 bazel: Encapsulate rp2040 WORKSPACE deps into deps

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: fbb072a3e3d0a9b..74612309f33820a
Roller-URL: https://ci.chromium.org/b/8744128843243496305
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I94f2f1bc2e88f393ac5b7bbd971c79f9d695a19b
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/218217
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index fbb072a..7461230 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit fbb072a3e3d0a9b861a2003bbdb7cb79f576d421
+Subproject commit 74612309f33820a6aab168cc8ed05588a9047d49