locking, ACPI: Annotate c3_lock as raw
We cannot preempt this lock on -rt as we are in an interrupt disabled region and about to go into deep sleep. In mainline this change documents the low level nature of the lock - otherwise there's no functional difference. Lockdep and Sparse checking will work as usual. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Len Brown <len.brown@intel.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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