[roll] Roll fuchsia Revert "[aml-sdmmc][sdmmc] Core sdmmc depends on aml-sdmmc's power element."

This reverts commit 0dcf3a1644f9fc9973e4d8888a8229342deff477.

Reason for revert: Possible cause of b/342205990.

Original change's description:
> [aml-sdmmc][sdmmc] Core sdmmc depends on aml-sdmmc's power element.
>
> The (parent) aml-sdmmc driver serves the PowerTokenProvider protocol.
> The (child) core sdmmc driver invokes the GetToken() call of this
> protocol to obtain a power dependency token to its parent driver's
> power element, and declares a dependency on it.
>
> Test: Manually tested system suspend/resume flow.
> Test: fx test sdmmc-block-test
> Test: fx test aml-sdmmc-test
> Original-Bug: b/332392662
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1019532

Original-Bug: b/332392662
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1052924
Original-Revision: 2820771085b52841ae6c3e99cafb83d47d96710d
GitOrigin-RevId: 72a11d13266cf2ffceed90cb5714b4404235d859
Change-Id: I6f6e49cb371a22a55362a57410a28d5b1f7f2c33
diff --git a/stem b/stem
index 9aa8f45..6ac41fe 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="f4f18feef8d4194d88edb7a6145410206b146927"/>
+             revision="2820771085b52841ae6c3e99cafb83d47d96710d"/>
   </projects>
   <hooks>
     <hook name="install-environment"