refactor(cpus): convert the Cortex-A76 to use the errata framework

Testing:
   - Manual comparison of disassembly with and without conversion.
   - Using the test script in gerrit - 19136
   - Building with errata and stepping through from ArmDS and running tftf.

Change-Id: I126f09de44b16e8bbb7e32477b880b4650eef23b
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
2 files changed