zipitz2: restore board support

zipitz2 was dropped in 49d8899ba9c26335e4a12e01c18028fc5e40c796

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
diff --git a/board/zipitz2/Kconfig b/board/zipitz2/Kconfig
new file mode 100644
index 0000000..c663504
--- /dev/null
+++ b/board/zipitz2/Kconfig
@@ -0,0 +1,9 @@
+if TARGET_ZIPITZ2
+
+config SYS_BOARD
+	default "zipitz2"
+
+config SYS_CONFIG_NAME
+	default "zipitz2"
+
+endif