- In sparc64_init() remove the call to tick_stop(). There's no need to   call tick_stop() again after tick_init() as tick interrupts already   have been disabled as part of tick_init(). - In spinlock_enter() replace the magic value for PIL TICK with the   respective macro. - Use FBSDID.
- In sparc64_init() remove the call to tick_stop(). There's no need to
  call tick_stop() again after tick_init() as tick interrupts already
  have been disabled as part of tick_init().
- In spinlock_enter() replace the magic value for PIL TICK with the
  respective macro.
- Use FBSDID.

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