PM / wakeup: Make events_lock a RAW_SPINLOCK

[ Upstream commit 1debb85a1d7d5c7655b4574f5b0ddf5f7c84873e ]

The `events_lock' is acquired during suspend while interrupts are
disabled even on RT. The lock is taken only for a very brief moment.
Make it a RAW lock which avoids "sleeping while atomic" warnings on RT.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>