This adds the ACP (Audio CoProcessor) IP driver and wires
it up to the amdgpu driver.  The ACP block provides the DMA
engine for i2s based ALSA driver. This is required for audio
on APUs that utilize an i2s codec.
Reviewed-by: NJammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: NMaruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Reviewed-by: NMurali Krishna Vemuri <murali-krishna.vemuri@amd.com>
Signed-off-by: NMaruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Signed-off-by: NChunming Zhou <david1.zhou@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>