zipitz2: restore board support

zipitz2 was dropped in 49d8899ba9c26335e4a12e01c18028fc5e40c796

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
diff --git a/configs/zipitz2_defconfig b/configs/zipitz2_defconfig
new file mode 100644
index 0000000..2977ccc
--- /dev/null
+++ b/configs/zipitz2_defconfig
@@ -0,0 +1,7 @@
+CONFIG_ARM=y
+CONFIG_TARGET_ZIPITZ2=y
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_NET is not set
+# CONFIG_CMD_NFS is not set
+CONFIG_SYS_PROMPT="$ "