There are configurations where CONFIG_ACPI but !CONFIG_PM.  In this
case, pata_acpi can be selected but won't build.  Fix it.
Reported by Avuton Olrich.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Avuton Olrich <avuton@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
        .id_table               = pacpi_pci_tbl,
        .probe                  = pacpi_init_one,
        .remove                 = ata_pci_remove_one,
+#ifdef CONFIG_PM
        .suspend                = ata_pci_device_suspend,
        .resume                 = ata_pci_device_resume,
+#endif
 };
 
 static int __init pacpi_init(void)