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/hikey_defconfig b/configs/hikey_defconfig
index e20f8bc..3901dfe 100644
--- a/configs/hikey_defconfig
+++ b/configs/hikey_defconfig
@@ -1,5 +1,6 @@
 CONFIG_ARM=y
 CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_IDENT_STRING="hikey"
 CONFIG_DEFAULT_DEVICE_TREE="hi6220-hikey"
 CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_IMLS is not set