ANDROID: arm64: Enable dynamic sched_domain flag setting

The patch lets the arch_topology driver take over setting of
sched_domain flags that should be detected dynamically based on the
actual system topology.

cc: Catalin Marinas <catalin.marinas@arm.com>
cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
Change-Id: I7886c0a53899987e77ef6937e1c667bf32a58bfd
Signed-off-by: Chris Redpath <chris.redpath@arm.com>