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
2 files changed