sh: define CONFIG_DISPLAY_BOARDINFO to print board information

All SH boards define a checkboard() function which outputs basic board
information on boot, however generic board support requires to define
CONFIG_DISPLAY_BOARDINFO to do that, so define it for the boards.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/ms7720se.h b/include/configs/ms7720se.h
index d136726..87f8712 100644
--- a/include/configs/ms7720se.h
+++ b/include/configs/ms7720se.h
@@ -21,6 +21,7 @@
 #define CONFIG_BOOTFILE		"/boot/zImage"
 #define CONFIG_LOADADDR		0x8E000000
 
+#define CONFIG_DISPLAY_BOARDINFO
 #undef  CONFIG_SHOW_BOOT_PROGRESS
 
 /* MEMORY */