sh: Add support Renesas Solutions Migo-R board

Migo-R is a board based on SH7722 and has may devices.
In this patch, supported SCIF, NOR flash and Ethernet.

Signed-off-by: Yusuke Goda <goda.yusuke@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/Makefile b/Makefile
index 4255cf5..0192886 100644
--- a/Makefile
+++ b/Makefile
@@ -2852,6 +2852,11 @@
 	@echo "#define CONFIG_MS7722SE 1" > $(obj)include/config.h
 	@$(MKCONFIG) -a $(@:_config=) sh sh4 ms7722se
 
+MigoR_config :       unconfig
+	@ >include/config.h
+	@echo "#define CONFIG_MIGO_R 1" >> include/config.h
+	@./mkconfig -a $(@:_config=) sh sh4 MigoR
+
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