stm32f7: enable board info read from device tree

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
cc: Christophe KERELLO <christophe.kerello@st.com>
diff --git a/include/configs/stm32f746-disco.h b/include/configs/stm32f746-disco.h
index 349ee3a..73a316d 100644
--- a/include/configs/stm32f746-disco.h
+++ b/include/configs/stm32f746-disco.h
@@ -72,4 +72,5 @@
 #define CONFIG_CMD_MEM
 #define CONFIG_CMD_CACHE
 #define CONFIG_BOARD_LATE_INIT
+#define CONFIG_DISPLAY_BOARDINFO
 #endif /* __CONFIG_H */