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/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c
index 4f6afaa..f364dcf 100644
--- a/arch/s390/hypfs/hypfs_vm.c
+++ b/arch/s390/hypfs/hypfs_vm.c
@@ -245,7 +245,7 @@
 	d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr));
 	if (IS_ERR(d2fc))
 		return PTR_ERR(d2fc);
-	get_clock_ext(d2fc->hdr.tod_ext);
+	get_tod_clock_ext(d2fc->hdr.tod_ext);
 	d2fc->hdr.len = count * sizeof(struct diag2fc_data);
 	d2fc->hdr.version = DBFS_D2FC_HDR_VERSION;
 	d2fc->hdr.count = count;