Revert "sched/uclamp: Fix a uninitialized variable warnings"

This reverts commit 89ad8a67.

It breaks the Android kernel abi, so revert it.  If it needs to come
back later, it can do so in an abi-safe way.

Bug: 161946584
Cc: Qais Yousef <qyousef@google.com>
Change-Id: I5e23eb845f1e2558992cdfe828e9ebcf32055a52
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>