sh: rsk7203: Moved rsk7203 board to board/renesas

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/Makefile b/Makefile
index d2ceee6..983a3cd 100644
--- a/Makefile
+++ b/Makefile
@@ -3121,7 +3121,7 @@
 rsk7203_config: unconfig
 	@ >include/config.h
 	@echo "#define CONFIG_RSK7203 1" >> include/config.h
-	@./mkconfig -a $(@:_config=) sh sh2 rsk7203
+	@./mkconfig -a $(@:_config=) sh sh2 rsk7203 renesas
 
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 ## sh3 (Renesas SuperH)