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/x600_defconfig b/configs/x600_defconfig
index 47579a5..a5222b3 100644
--- a/configs/x600_defconfig
+++ b/configs/x600_defconfig
@@ -5,6 +5,7 @@
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_IDENT_STRING="-SPEAr"
 CONFIG_BOOTDELAY=3
+# CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_SPL=y
 CONFIG_SPL_NOR_SUPPORT=y
 CONFIG_HUSH_PARSER=y