[roll] Roll fuchsia [drivers][power] Add support library

Add the initial version of support library to help drivers use
the power framework. The library creates a simple path for
drivers to get their power configuration as provided by the
board driver, translate this into power framework types, and add
their power element(s) to the power broker's topology.

Future work might handle serving element access tokens to child
drivers and/or make it easier for drivers to work with the power
framework APIs used for element management and control.

Original-Bug: 42083491
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/987383
Original-Revision: 384f3be170711cf766b9d1a49d2776a872f6ad76
GitOrigin-RevId: c02f523c7f9edb6e159b52d81b98791a6fe5e453
Change-Id: I12a1883085ebaa4a435414093225bc5d2fb98455
diff --git a/stem b/stem
index dfbae28..d7c144a 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="b8143f9cf007efd632d4712a2bc138d8ea441e2a"/>
+             revision="384f3be170711cf766b9d1a49d2776a872f6ad76"/>
   </projects>
   <hooks>
     <hook name="install-environment"