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/spear320_defconfig b/configs/spear320_defconfig
index 7b09882..5b4e29c 100644
--- a/configs/spear320_defconfig
+++ b/configs/spear320_defconfig
@@ -3,6 +3,7 @@
 CONFIG_IDENT_STRING="-SPEAr"
 CONFIG_SYS_EXTRA_OPTIONS="SPEAR320"
 CONFIG_BOOTDELAY=1
+# CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_CMD_I2C=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y