Update TF-A version to 2.1

Change-Id: I6d8a6419df4d4924214115facbce90715a1a0371
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
diff --git a/Makefile b/Makefile
index 11d0d7a..f3312c6 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@
 # Trusted Firmware Version
 #
 VERSION_MAJOR			:= 2
-VERSION_MINOR			:= 0
+VERSION_MINOR			:= 1
 
 # Default goal is build all images
 .DEFAULT_GOAL			:= all