Bump U-boot version.

Change-Id: I5a06e0d20e777aadaace61a276f277761b0f25f3
diff --git a/Makefile b/Makefile
index bcb7f9b..ecbec75 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@
 
 VERSION = 2017
 PATCHLEVEL = 03
-SUBLEVEL =
+SUBLEVEL = 1
 EXTRAVERSION =
 NAME =