mm: slub: Panic instead of restoring corrupted bytes

Resiliency of slub was added for production systems in an
attempt to restore corruptions and allow production environments
to continue to run.

In debug setups, this may no be desirable. Thus rather than
attempting to restore corrupted bytes in poisoned zones, panic
to attempt to catch more context of what was going on in the
system at the time.

Add the CONFIG_SLUB_DEBUG_PANIC_ON defconfig option to allow
debug builds to turn on this panic option.

Change-Id: I01763e8eea40a4544e9b7e48c4e4d40840b6c82d
Signed-off-by: David Keitel <dkeitel@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>