sched: idle: Add support to print wake irqs during s2idle

syscore ops prints wake irq during "deep" suspend exit however
syscore ops do not execute for "s2idle" suspend.

Add changes to print wakeup irq during "s2idle" mode exit.

The change prints wakeup irq from the first cpu waking up from s2idle
during which local irqs on the cpu is disabled.

Change-Id: Idd05d42f30b97cc5f9d62627339e21731f131673
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>