Prepare v2015.04-rc1

Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/Makefile b/Makefile
index 9b406c8..92faed6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 VERSION = 2015
-PATCHLEVEL = 01
+PATCHLEVEL = 04
 SUBLEVEL =
-EXTRAVERSION =
+EXTRAVERSION = -rc1
 NAME =
 
 # *DOCUMENTATION*