sh: Added support for SH7720 based board MPR2.

Signed-off-by: Mark Jonas <mark.jonas@de.bosch.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/Makefile b/Makefile
index 948108b..f985045 100644
--- a/Makefile
+++ b/Makefile
@@ -2837,6 +2837,11 @@
 #########################################################################
 ## sh3 (Renesas SuperH)
 #########################################################################
+mpr2_config: unconfig
+	@ >include/config.h
+	@echo "#define CONFIG_MPR2 1" >> include/config.h
+	@$(MKCONFIG) -a $(@:_config=) sh sh3 mpr2
+
 ms7720se_config: unconfig
 	@echo "#define CONFIG_MS7720SE 1" > include/config.h
 	@$(MKCONFIG) -a $(@:_config=) sh sh3 ms7720se