serial: sh: Add support R8A7790

This adds the preset value to register, and setup of baudrate.

Signed-off-by: Kouei Abe <kouei.abe.cp@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c
index 67cc0dc..0826d59 100644
--- a/drivers/serial/serial_sh.c
+++ b/drivers/serial/serial_sh.c
@@ -1,5 +1,6 @@
 /*
  * SuperH SCIF device driver.
+ * Copyright (C) 2013  Renesas Electronics Corporation
  * Copyright (C) 2007,2008,2010 Nobuhiro Iwamatsu
  * Copyright (C) 2002 - 2008  Paul Mundt
  *