ANDROID: sched/autogroup: Define autogroup_path() for !CONFIG_SCHED_DEBUG

Define autogroup_path() even in the !CONFIG_SCHED_DEBUG case. If
CONFIG_SCHED_AUTOGROUP is enabled the path of an autogroup has to be
available to be printed in the load tracking trace events provided by
this patch-stack regardless whether CONFIG_SCHED_DEBUG is set or not.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Change-Id: I6f59783a83e0965d96e84446f64b29ad0c4dc35a
Signed-off-by: Chris Redpath <chris.redpath@arm.com>