PM / wakeup: Make s2idle_lock a RAW_SPINLOCK

PM / wakeup: Make s2idle_lock a RAW_SPINLOCK

BugLink: http://bugs.launchpad.net/bugs/1815234
[ Upstream commit 62fc00a6611a0014c85763f9def1fc07c15d1302 ]

The `s2idle_lock' is acquired during suspend while interrupts are
disabled even on RT. The lock is acquired for short sections only.
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: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>