[SPARC/64] Rename some functions like PowerPC

This is to make the of merge easier.  Also rename of_bus_type.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index 62e316a..592ffcd 100644
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -835,7 +835,7 @@
 		return 0;
 	}
 
-	return of_register_driver(&clock_driver, &of_bus_type);
+	return of_register_driver(&clock_driver, &of_platform_bus_type);
 }
 
 /* Must be after subsys_initcall() so that busses are probed.  Must