sh: Add Renesas rsk7264 board

The rsk7264 (also know as rsk2+sh7264) is an SH2A based board
with 64MB NAND flash and 64MB SDRAM. It is very similar to the
rsk7203 board.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index f895e9a..7982c36 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -142,6 +142,10 @@
 
 	mpq101		MPC8548
 
+Phil Edworthy <phil.edworthy@renesas.com>
+
+	rsk7264		SH7264
+
 Dirk Eibach <eibach@gdsys.de>
 
 	devconcenter	PPC460EX