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/gr_ep2s60_defconfig b/configs/gr_ep2s60_defconfig
index 302d936..5b045e3 100644
--- a/configs/gr_ep2s60_defconfig
+++ b/configs/gr_ep2s60_defconfig
@@ -1,4 +1,5 @@
 CONFIG_SPARC=y
+CONFIG_IDENT_STRING=" Gaisler LEON3 EP2S60"
 CONFIG_SYS_TEXT_BASE=0x00000000
 CONFIG_TARGET_GR_EP2S60=y
 CONFIG_BOOTDELAY=5