drm/amdgpu: add amdgpu ras aca query interface

v1:
add ACA error query interface

v2:
Add a new helper function to determine whether to use ACA or MCA.

Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_aca.c

@@ -577,6 +577,9 @@ int amdgpu_aca_add_handle(struct amdgpu_device *adev, struct aca_handle *handle,
 {
 	struct amdgpu_aca *aca = &adev->aca;
 
+	if (!amdgpu_aca_is_enabled(adev))
+		return 0;
+
 	return add_aca_handle(adev, &aca->mgr, handle, name, ras_info, data);
 }
 
@@ -613,6 +616,11 @@ static void aca_manager_fini(struct aca_handle_manager *mgr)
 		remove_aca(handle);
 }
 
+bool amdgpu_aca_is_enabled(struct amdgpu_device *adev)
+{
+	return adev->aca.is_enabled;
+}
+
 int amdgpu_aca_init(struct amdgpu_device *adev)
 {
 	struct amdgpu_aca *aca = &adev->aca;