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/vexpress_ca5x2_defconfig b/configs/vexpress_ca5x2_defconfig
index 505e6b0..38d691e 100644
--- a/configs/vexpress_ca5x2_defconfig
+++ b/configs/vexpress_ca5x2_defconfig
@@ -1,6 +1,7 @@
 CONFIG_ARM=y
 CONFIG_TARGET_VEXPRESS_CA5X2=y
 # CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_CONSOLE is not set
 # CONFIG_CMD_BOOTD is not set