ANDROID: PM: Fix suspend spinlock in IRQ context

Fix bug in abort of fs_sync during suspend feature, since a spinlock is
taken in IRQ context, we need to use spinlock_irqsave(). This feature is
not yet upstream, so fix needs to be made here.

Link: https://lore.kernel.org/all/20250911185314.2377124-1-wusamuel@google.com/


Bug: 452395562
Bug: 452952574
Change-Id: I8652a579ebd6bb3a6d218f2dd8983712ba6a6578
Signed-off-by: Samuel Wu <wusamuel@google.com>
(cherry picked from commit ec71ebf8)