sh: Add support Renesas Solutions R2D plus board

R2D plus is SH reference board used with SH7751R.
This board has 266Mhz CPU, 64MB SDRAM, Cardbus, CF interface,
one PCI bus, VGA, and two Ethernet controller.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/MAKEALL b/MAKEALL
index ea02a8a..756cf87 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -701,6 +701,7 @@
 	ms7722se	\
 	Migo-R		\
 	r7780mp		\
+	r2dplus		\
 "
 
 LIST_sh3="		\