sh: Update sh timer function

Change to write/readX function and fix timer problem.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/lib_sh/Makefile b/lib_sh/Makefile
index 4034381..f7c6479 100644
--- a/lib_sh/Makefile
+++ b/lib_sh/Makefile
@@ -26,7 +26,11 @@
 
 COBJS-y	+= board.o
 COBJS-y	+= bootm.o
-# COBJS-y	+= time.o
+ifeq ($(CONFIG_SH2),y)
+COBJS-y	+= time_sh2.o
+else
+COBJS-y	+= time.o
+endif
 
 SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))