[roll] Roll fuchsia [kernel] Pass PhysHandoff pointer from physboot to kernel

This changes the argument passed from physboot to the kernel
proper from being the data ZBI pointer as in the ZBI protocol to
being the PhysHandoff data structure pointer.  The ZBI pointer is
now found within.

Original-Bug: 84107
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/582147
Original-Revision: 6a0fd696cde68b7c65033da57ab911ee5db75064
GitOrigin-RevId: 5e2fe7e7ca626359449016b61d452f46a3befe00
Change-Id: I72de526b52262c4c7b0aacd13a4b21c774124860
diff --git a/stem b/stem
index 40cd0d9..45951ca 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="eae4a607451e21ff2c6d80be49711257f09b90d0"/>
+             revision="6a0fd696cde68b7c65033da57ab911ee5db75064"/>
   </projects>
   <hooks>
     <hook name="install-environment"