s390/time: rename tod clock access functions

Fix name clash with some common code device drivers and add "tod"
to all tod clock access function names.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/block/dasd_erp.c b/drivers/s390/block/dasd_erp.c
index d01ef82..3250cb4 100644
--- a/drivers/s390/block/dasd_erp.c
+++ b/drivers/s390/block/dasd_erp.c
@@ -102,7 +102,7 @@
 		pr_err("%s: default ERP has run out of retries and failed\n",
 		       dev_name(&device->cdev->dev));
 		cqr->status = DASD_CQR_FAILED;
-		cqr->stopclk = get_clock();
+		cqr->stopclk = get_tod_clock();
         }
         return cqr;
 }				/* end dasd_default_erp_action */
@@ -146,7 +146,7 @@
 		cqr->status = DASD_CQR_DONE;
 	else {
 		cqr->status = DASD_CQR_FAILED;
-		cqr->stopclk = get_clock();
+		cqr->stopclk = get_tod_clock();
 	}
 
 	return cqr;