[roll third_party/pigweed] pw_analog: Migrate AnalogInput to Doxygen

Original-Bug: b/299147635
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/170511

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 0ed9506ccce7c3b..f9b10568994c147
Roller-URL: https://ci.chromium.org/b/8770202858725443713
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I130624a9bb0a7abca41d8a5a56ffde723ebb6c97
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/170441
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 0ed9506..f9b1056 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 0ed9506ccce7c3ba385e79d5b903e71cf5fe9a4a
+Subproject commit f9b10568994c1472c203ec56ac810f4ae112a499