drm/amdgpu: Add function parameter 'xcc_mask' not described in 'amdgpu_vm_flush_compute_tlb'

Fixes the below:

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c:1373: warning: Function parameter or member 'xcc_mask' not described in 'amdgpu_vm_flush_compute_tlb'

Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Pan, Xinhui" <Xinhui.Pan@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1443,6 +1443,7 @@ int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
  * @adev: amdgpu_device pointer
  * @vm: requested vm
  * @flush_type: flush type
+ * @xcc_mask: mask of XCCs that belong to the compute partition in need of a TLB flush.
  *
  * Flush TLB if needed for a compute VM.
  *