Revert "PM: runtime: Fix unpaired parent child_count for force_resume"

This reverts commit 182f1f72 as it
breaks the kernel abi at the moment.  It will be restored at a later
point in time.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I1759a85ca9b16d3ad0610a1a355ee9a7bfe846c4