[roll] Roll fuchsia [boot-shim] Switch x86 shim to use uart::all::Config

legacy-x86 shim and some functions using uart::all::Driver when actually
figuring out config.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1247125
Original-Revision: ab2c172db5c7a39100d2de236011328eae3c9b61
GitOrigin-RevId: e7d3f21178b6cd505a90888d33c6d516b39cd0ab
Change-Id: Ifa612b43b6848888a8e65a75e31acdeb33f3db7f
diff --git a/stem b/stem
index 4edb276..32e4e74 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="c465542ac25d74f2b005e409be9335d21f65ae73"
+             revision="ab2c172db5c7a39100d2de236011328eae3c9b61"
              />
   </projects>
   <hooks>