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/shmin.h b/include/configs/shmin.h
index e0fc3a2..dde6625 100644
--- a/include/configs/shmin.h
+++ b/include/configs/shmin.h
@@ -26,6 +26,7 @@
  * you should set undef.
  */
 #undef  CONFIG_SHOW_BOOT_PROGRESS
+#define CONFIG_DISPLAY_BOARDINFO
 
 /* system */
 #define SHMIN_SDRAM_BASE		(0x8C000000)