ACPI: OSL: Use spin locks without disabling interrupts

After commit 7a36b901 ("ACPI: OSL: Use a threaded interrupt handler
for SCI") any ACPICA code never runs in a hardirq handler, so it need
not dissable interrupts on the local CPU when acquiring a spin lock.

Make it use spin locks without disabling interrupts.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/osl.c

@@ -1515,20 +1515,18 @@ void acpi_os_delete_lock(acpi_spinlock handle)
 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
 	__acquires(lockp)
 {
-	acpi_cpu_flags flags;
-
-	spin_lock_irqsave(lockp, flags);
-	return flags;
+	spin_lock(lockp);
+	return 0;
 }
 
 /*
  * Release a spinlock. See above.
  */
 
-void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
+void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags not_used)
 	__releases(lockp)
 {
-	spin_unlock_irqrestore(lockp, flags);
+	spin_unlock(lockp);
 }
 
 #ifndef ACPI_USE_LOCAL_CACHE