lib: add uuid_str_to_bin for use with bootp and PXE uuid

Signed-off-by: Jason Hobbs <jason.hobbs@calxeda.com>
diff --git a/include/common.h b/include/common.h
index f9fea08..7950c8b 100644
--- a/include/common.h
+++ b/include/common.h
@@ -694,6 +694,10 @@
 /* lib/time.c */
 void	udelay        (unsigned long);
 
+/* lib/uuid.c */
+void uuid_str_to_bin(const char *uuid, unsigned char *out);
+int uuid_str_valid(const char *uuid);
+
 /* lib/vsprintf.c */
 ulong	simple_strtoul(const char *cp,char **endp,unsigned int base);
 int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);