common: Add DISPLAY_BOARDINFO

Create a Kconfig entry for DISPLAY_BOARDINFO and make it be the default
in certain architectures.  Migrate all config files.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/at91sam9g20ek_2mmc_nandflash_defconfig b/configs/at91sam9g20ek_2mmc_nandflash_defconfig
index a15351d..6d2bfa1 100644
--- a/configs/at91sam9g20ek_2mmc_nandflash_defconfig
+++ b/configs/at91sam9g20ek_2mmc_nandflash_defconfig
@@ -3,6 +3,7 @@
 CONFIG_TARGET_AT91SAM9260EK=y
 CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9G20,AT91SAM9G20EK_2MMC,SYS_USE_NANDFLASH"
 CONFIG_BOOTDELAY=3
+# CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_SYS_PROMPT="U-Boot> "
 # CONFIG_CMD_BDI is not set
 CONFIG_CMD_BOOTZ=y