[roll] Roll fuchsia [drivers][broadcom] Move temporary into variable

llvm/llvm-project#120223 became more strict
about discarded value expressions. This CL moves the array reference
into a local variable to operate on.

Original-Bug: 385748190
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1179632
Original-Revision: bac0bfd54ea3efbc387ccf36a5a8e2e99debce0c
GitOrigin-RevId: d4eb0af1986902cf6b06628fb3f5965e68d9b45b
Change-Id: I97d076d5263521cf69e59f9e8a479dbeba2fa148

Author: Caslyn Tonelli

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="967bd828674645bc9f92ec15c8b092e70044fa05"/>
+             revision="bac0bfd54ea3efbc387ccf36a5a8e2e99debce0c"/>
   </projects>
   <hooks>
     <hook name="install-environment"