Add Cache Coherency Unit (CCU) driver.
CCU is to ensures consistency of shared data between multi masters
in the system.
Driver initializes CCU's directories and coherency agent
interfaces in CCU IP.
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
