power_state: get rid of write-only variable in SATA

power_state is scheduled for removal, and libata uses it in write-only
mode. Remove it.
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/ata/libata-core.c

@@ -6560,8 +6560,6 @@ int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
 	ata_lpm_enable(host);
 
 	rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
-	if (rc == 0)
-		host->dev->power.power_state = mesg;
 	return rc;
 }
 
@@ -6580,7 +6578,6 @@ void ata_host_resume(struct ata_host *host)
 {
 	ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
 			    ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
-	host->dev->power.power_state = PMSG_ON;
 
 	/* reenable link pm */
 	ata_lpm_disable(host);