drm/amd: add ACP driver support

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: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Murali Krishna Vemuri <murali-krishna.vemuri@amd.com>
Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 8ae7ab6..20c2415 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -162,6 +162,8 @@
 source "drivers/gpu/drm/amd/amdgpu/Kconfig"
 source "drivers/gpu/drm/amd/powerplay/Kconfig"
 
+source "drivers/gpu/drm/amd/acp/Kconfig"
+
 source "drivers/gpu/drm/nouveau/Kconfig"
 
 config DRM_I810