[roll] Roll fuchsia [sysmem] rename Device to Sysmem

Now that sysmem is not a driver/device, we can name this class Sysmem
instead of Device.

Original-BUG: b/362587923
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1109736
Original-Revision: 054a5dbe8718dfac5cfdf8df6ed5199a10388395
GitOrigin-RevId: ea117a92bbeb71ecac9e04b76bba01a7e7cdf9c7
Change-Id: Ie2790999e8f91ea28ed5f6f9faab3083f1693b2d
diff --git a/stem b/stem
index 2235955..d5f3665 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="60cbea91d7c95faf8dec829a5384a4a1b1b64c93"/>
+             revision="054a5dbe8718dfac5cfdf8df6ed5199a10388395"/>
   </projects>
   <hooks>
     <hook name="install-environment"