libata: add missing CONFIG_PM in LLDs

Add missing #ifdef CONFIG_PM conditionals around all PM related parts
in libata LLDs.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 61572d8..dc42ba1 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -253,8 +253,10 @@
 	.id_table		= piix_pci_tbl,
 	.probe			= piix_init_one,
 	.remove			= ata_pci_remove_one,
+#ifdef CONFIG_PM
 	.suspend		= ata_pci_device_suspend,
 	.resume			= ata_pci_device_resume,
+#endif
 };
 
 static struct scsi_host_template piix_sht = {
@@ -273,8 +275,10 @@
 	.slave_configure	= ata_scsi_slave_config,
 	.slave_destroy		= ata_scsi_slave_destroy,
 	.bios_param		= ata_std_bios_param,
+#ifdef CONFIG_PM
 	.resume			= ata_scsi_device_resume,
 	.suspend		= ata_scsi_device_suspend,
+#endif
 };
 
 static const struct ata_port_operations piix_pata_ops = {