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/hrcon_defconfig b/configs/hrcon_defconfig
index f67eda7..b6b583d 100644
--- a/configs/hrcon_defconfig
+++ b/configs/hrcon_defconfig
@@ -1,4 +1,5 @@
 CONFIG_PPC=y
+CONFIG_IDENT_STRING=" hrcon 0.01"
 CONFIG_MPC83xx=y
 CONFIG_TARGET_HRCON=y
 CONFIG_FIT=y