ACPI: PM: Print additional debug message in acpi_s2idle_wake()

Make acpi_s2idle_wake() print an additional debug message when the
SCI is going to be rearmed for system wakeup to help diagnose
wakeup-related issues.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/sleep.c

@@ -758,6 +758,8 @@ bool acpi_s2idle_wake(void)
 			return true;
 		}
 
+		pm_pr_dbg("Rearming ACPI SCI for wakeup\n");
+
 		pm_wakeup_clear(acpi_sci_irq);
 		rearm_wake_irq(acpi_sci_irq);
 	}