sh: Add support shmin board

This adds support for the SHMIN SH7706 board(T-SH7706LAN).
The CPU of this board is SH7706.
There are SDRAM of 32M byte, Flash memory of 512K byte, Serial,
10Base Ether and MMC.

http://web.kyoto-inet.or.jp/people/takagaki/T-SH7706/T-SH7706.htm

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/board/shmin/lowlevel_init.S b/board/shmin/lowlevel_init.S
new file mode 100644
index 0000000..b29da35
--- /dev/null
+++ b/board/shmin/lowlevel_init.S
@@ -0,0 +1,36 @@
+/*
+ * (C) Copyright 2008, 2010 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <version.h>
+
+#include <asm/processor.h>
+#include <asm/macro.h>
+
+
+	.global	lowlevel_init
+
+	.text
+	.align	2
+
+lowlevel_init:
+	/* Use setting of original bootloader */
+	rts
+	nop
+	.align 2