[roll] Roll fuchsia Revert "[kernel][phys][arm64] Hand off root and identity page tables"

This reverts commit 3ff965bac29532aa1b164bbf791f76b1d39a0eef.

Reason for revert: testing revert for ZIRCON KERNEL OOPS failures in OTA tests

Original change's description:
> [kernel][phys][arm64] Hand off root and identity page tables
>
> As already done with riscv64 and x86, this is a major step toward
> physboot properly creating the kernel's address space: it hands off the
> address space as it is currently constructed, upper and lower, enabling
> the kernel to bootstrap from the already-constructed identity map.
>
> Original-Bug: 42164859
> Change-Id: If4f1af321d9763575c226bc1d47b6723d1e548a1
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1173133
> Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
> Reviewed-by: Travis Geiselbrecht <travisg@google.com>
> Reviewed-by: Roland McGrath <mcgrathr@google.com>
> Fuchsia-Auto-Submit: Joshua Seaton <joshuaseaton@google.com>

Original-Bug: 42164859
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1178737
Original-Revision: cb9cf3ee09cf6be133725962c88bba87a4b76be1
GitOrigin-RevId: 17619f6fb8d3233a39aa2fbe4f31b13ab1b9ab4e
Change-Id: I5cd1e0eb5ea1c568bf71b3c19cb33a796175d745
diff --git a/stem b/stem
index f8a981a..b859964 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="5429f13a72635b4930ff4a9f1883f52bdaaee56d"/>
+             revision="cb9cf3ee09cf6be133725962c88bba87a4b76be1"/>
   </projects>
   <hooks>
     <hook name="install-environment"