Kconfig: Move config IDENT_STRING to Kconfig

Move the config IDENT_STRING to Kconfig and migrate all boards

[sivadur: Migrate zynq boards]
Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
[trini: Update configs, add some default to sunxi Kconfig]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/neo_defconfig b/configs/neo_defconfig
index 93a402f..18b43e4 100644
--- a/configs/neo_defconfig
+++ b/configs/neo_defconfig
@@ -1,4 +1,5 @@
 CONFIG_PPC=y
+CONFIG_IDENT_STRING=" neo 0.02"
 CONFIG_4xx=y
 CONFIG_TARGET_NEO=y
 CONFIG_FIT=y