Update the version to 2.0

Change-Id: Icbc556d47a58d0870577b1bf1cd27cc5827fd56d
Signed-off-by: Soby Mathew <soby.mathew@arm.com>

Makefile

@@ -7,8 +7,8 @@
 #
 # Trusted Firmware Version
 #
-VERSION_MAJOR			:= 1
-VERSION_MINOR			:= 6
+VERSION_MAJOR			:= 2
+VERSION_MINOR			:= 0
 
 # Default goal is build all images
 .DEFAULT_GOAL			:= all