locking/local_lock: Fix all kernel-doc warnings

locking/local_lock: Fix all kernel-doc warnings

Modify kernel-doc comments in local_lock.h to prevent warnings:

  Warning: include/linux/local_lock.h:9 function parameter 'lock' not described in 'local_lock_init'
  Warning: include/linux/local_lock.h:56 function parameter 'lock' not described in 'local_trylock_init'
  Warning: include/linux/local_lock.h:56 expecting prototype for local_lock_init(). Prototype was for local_trylock_init() instead

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://patch.msgid.link/20251128065925.917917-1-rdunlap@infradead.org