util_version: new helper for displaying version info

This is so all utilities can have this flag and not just dtc.

Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

util.c

@@ -34,6 +34,7 @@
 
 #include "libfdt.h"
 #include "util.h"
+#include "version_gen.h"
 
 char *xstrdup(const char *s)
 {
@@ -374,3 +375,9 @@ void utilfdt_print_data(const char *data, int len)
 		printf("]");
 	}
 }
+
+void util_version(void)
+{
+	printf("Version: %s\n", DTC_VERSION);
+	exit(0);
+}