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/dockstar_defconfig b/configs/dockstar_defconfig
index 645f652..e263c5b 100644
--- a/configs/dockstar_defconfig
+++ b/configs/dockstar_defconfig
@@ -3,6 +3,7 @@
 CONFIG_TARGET_DOCKSTAR=y
 CONFIG_IDENT_STRING="\nSeagate FreeAgent DockStar"
 CONFIG_BOOTDELAY=3
+# CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_SYS_PROMPT="DockStar> "
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set