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/char/sclp.c b/drivers/s390/char/sclp.c
index 12c16a6..bd6871b 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -450,7 +450,7 @@
 	timeout = 0;
 	if (timer_pending(&sclp_request_timer)) {
 		/* Get timeout TOD value */
-		timeout = get_clock() +
+		timeout = get_tod_clock() +
 			  sclp_tod_from_jiffies(sclp_request_timer.expires -
 						jiffies);
 	}
@@ -472,7 +472,7 @@
 	while (sclp_running_state != sclp_running_state_idle) {
 		/* Check for expired request timer */
 		if (timer_pending(&sclp_request_timer) &&
-		    get_clock() > timeout &&
+		    get_tod_clock() > timeout &&
 		    del_timer(&sclp_request_timer))
 			sclp_request_timer.function(sclp_request_timer.data);
 		cpu_relax();