sh: espt-giga board support

This adds support for the ESPT-Giga (Ethernet Serial Parallel
Translator) SH7763-based reference board.

Board support is relatively sparse, presently supporting serial,
gigabit ethernet, USB host, and MTD.

More information (in Japanese) available at:

	http://www.cente.jp/product/cente_hard/ESPT-Giga.html

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/boards/Kconfig b/arch/sh/boards/Kconfig
index bd3569a..48c043b 100644
--- a/arch/sh/boards/Kconfig
+++ b/arch/sh/boards/Kconfig
@@ -190,6 +190,13 @@
 	  Select SH7763RDP if configuring for a Renesas SH7763
 	  evaluation board.
 
+config SH_ESPT
+	bool "ESPT"
+	depends on CPU_SUBTYPE_SH7763
+	help
+	  Select ESPT if configuring for a Renesas SH7763
+	  with gigabit ether evaluation board.
+
 config SH_EDOSK7705
 	bool "EDOSK7705"
 	depends on CPU_SUBTYPE_SH7705