Initial Acortex RTL Commit

Initial version or Acortex RTL. Not compiled nor verified.
Added Acortex Codec Agent
Added I2C Scoreboard
Acortex TB Complete

Acortex TB Environment is complete. Compiled Acortex RTL+TB and cleaned
up errors. Base Test passes.
Minor Update

Moved configuration of pcm_mem_agent.driver to 'slave' mode from
acortex_base_test to acortex_env.
I2C Testing Complete

I2C Master has been tested & verified in syn_acortex_i2c_test. New PCM
test syn_acortex_pcm test is done, but yet to be run completely.
Misc Fixes

Misc fixes to remove runtime errors.
Completed Acortex Verification

Fixed few bugs and full PCM data path (not capture mode) is verified.