ACPI: EC: PM: Make acpi_ec_dispatch_gpe() print debug message

Add a pm_pr_dbg() debug statement to acpi_ec_dispatch_gpe() to print
a message when the EC GPE has been dispatched (because its status
was set).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>

drivers/acpi/ec.c

@@ -1980,7 +1980,11 @@ bool acpi_ec_dispatch_gpe(void)
 		return false;
 
 	ret = acpi_dispatch_gpe(NULL, first_ec->gpe);
-	return ret == ACPI_INTERRUPT_HANDLED;
+	if (ret == ACPI_INTERRUPT_HANDLED) {
+		pm_pr_dbg("EC GPE dispatched\n");
+		return true;
+	}
+	return false;
 }
 #endif /* CONFIG_PM_SLEEP */