[roll] Roll fuchsia [zircon][riscv] add RISC-V topology nodes to the ZBI boot structure

Currently just adds a field per cpu with the HART ID, sufficient to
detect and try to boot secondary cpus.

Original-Bug: 122868
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/820230
Original-Revision: b0dcadb588245713bc1179fdcabb2c0f3b75248f
GitOrigin-RevId: 1f34661d86ae88415502c9107f74ad67670e6678
Change-Id: Id9b975bc2f4b25f3696404ed1f0f74d460a262a9
diff --git a/stem b/stem
index 4bc8a61..e83120b 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="59b8b2593cf12df4182f5a390067ebb0d6a006b1"/>
+             revision="b0dcadb588245713bc1179fdcabb2c0f3b75248f"/>
   </projects>
   <hooks>
     <hook name="install-environment"