Incrementing the minor version to reflect upcoming v2.2 release

Also updated the readme.rst file with changes in v2.2 release

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I93e21473f4048867c29b6e0d9e854d07d3f71782
diff --git a/Makefile b/Makefile
index c200119..1269b6d 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 
 # TFTF Version
 VERSION_MAJOR		:= 2
-VERSION_MINOR		:= 1
+VERSION_MINOR		:= 2
 
 ################################################################################
 # Default values for build configurations, and their dependencies