sched deadline updates for 9.3
JIRA: https://issues.redhat.com/browse/RHEL-303
Tested: Stress tests using sched_deadline, general scheduler
related tests.
Fixes and updates mostly for the deadline scheduler
class. Bring the sched/deadline code up to roughly v6.3-rc1.
Signed-off-by: Phil Auld pauld@redhat.com