Revert "sched/deadline: Fix priority inheritance with multiple scheduling classes"

This reverts commit d2b65976 which is
commit 2279f540 upstream.

It breaks the Android ABI and is not needed in Android systems, so
revert it for now.  If it is still needed, it can be added back later in
an ABI-stable way.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: If069cb7d8460c5a00180a45085365747ffb8a8e7