common/Kconfig: Add DISPLAY_CPUINFO

Create a Kconfig entry for DISPLAY_CPUINFO 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/zmx25_defconfig b/configs/zmx25_defconfig
index 70f47f2..6c4d84f 100644
--- a/configs/zmx25_defconfig
+++ b/configs/zmx25_defconfig
@@ -1,6 +1,7 @@
 CONFIG_ARM=y
 CONFIG_TARGET_ZMX25=y
 CONFIG_BOOTDELAY=5
+# CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="zmx25> "
 CONFIG_AUTOBOOT_KEYED=y