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

This reverts commit 4ee882e0.

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
Change-Id: I7cb0b8d746022130d4f3ba2a2bdde7f7af66ebbc
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>