lockdep/selftests: Avoid using local_lock_{acquire|release}().

The local_lock related functions
  local_lock_acquire()
  local_lock_release()

are part of the internal implementation and should be avoided.
Define the lock as DEFINE_PER_CPU so the normal local_lock() function
can be used.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20211129174654.668506-7-bigeasy@linutronix.de