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/MIP405_defconfig b/configs/MIP405_defconfig
index c32bdd3..a38eac1 100644
--- a/configs/MIP405_defconfig
+++ b/configs/MIP405_defconfig
@@ -1,4 +1,5 @@
 CONFIG_PPC=y
+CONFIG_IDENT_STRING="\n(c) 2003 by MPL AG Switzerland, MEV-10072-001 released"
 CONFIG_4xx=y
 CONFIG_TARGET_MIP405=y
 CONFIG_BOOTDELAY=5