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_fba.c b/drivers/s390/block/dasd_fba.c
index 4146985..4dd0e2f 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -370,7 +370,7 @@
 	cqr->block = block;
 	cqr->expires = memdev->default_expires * HZ;	/* default 5 minutes */
 	cqr->retries = 32;
-	cqr->buildclk = get_clock();
+	cqr->buildclk = get_tod_clock();
 	cqr->status = DASD_CQR_FILLED;
 	return cqr;
 }