(Patch2)
A number of tests have got their own code for checking the presence of
extensions. This change replaces that code with is_extension_available
function.
Contributes to #627
Signed-off-by: Ellen Norris-Thompson <ellen.norris-thompson@arm.com>
Change-Id: I17e007e5ad009e522c5006c42537bf1170550a6f
Also changed the test so that any implementation supporting < 1.2 can skip the test.
Uses format that @gwawiork has recently used to verify device version.
