feat(sys_reg_trace): add trace system registers access test

Added a test to read trace system registers to ensure that EL3
is giving permission to non-secure EL2 to access these registers.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I0bdbb5aff81a78fc3a3766278c48b25bb6e1779f
11 files changed