ae111689f0
HDP conherence registers are remapped at driver level to an empty page in mmio space (the remapped mmio page). This change allocate and map the remapped mmio page to process space. Change-Id: I89c405c41870a79c5b58eea0d8e564aa35f55182 Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>