drm/amd/amdgpu/gmc_v7_0: Add some missing kernel-doc descriptions

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c:433: warning: Function parameter or member 'flush_type' not described in 'gmc_v7_0_flush_gpu_tlb_pasid'
 drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c:433: warning: Function parameter or member 'all_hub' not described in 'gmc_v7_0_flush_gpu_tlb_pasid'
 drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c:471: warning: Function parameter or member 'vmhub' not described in 'gmc_v7_0_flush_gpu_tlb'
 drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c:471: warning: Function parameter or member 'flush_type' not described in 'gmc_v7_0_flush_gpu_tlb'
 drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c:771: warning: Function parameter or member 'pasid' not described in 'gmc_v7_0_vm_decode_fault'
Acked-by: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c

@@ -424,6 +424,8 @@ static int gmc_v7_0_mc_init(struct amdgpu_device *adev)
  *
  * @adev: amdgpu_device pointer
  * @pasid: pasid to be flush
+ * @flush_type: type of flush
+ * @all_hub: flush all hubs
  *
  * Flush the TLB for the requested pasid.
  */
@@ -463,7 +465,9 @@ static int gmc_v7_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
  *
  * @adev: amdgpu_device pointer
  * @vmid: vm instance to flush
- *
+ * @vmhub: which hub to flush
+ * @flush_type: type of flush
+ * *
  * Flush the TLB for the requested page table (CIK).
  */
 static void gmc_v7_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
@@ -763,6 +767,7 @@ static void gmc_v7_0_gart_disable(struct amdgpu_device *adev)
  * @status: VM_CONTEXT1_PROTECTION_FAULT_STATUS register value
  * @addr: VM_CONTEXT1_PROTECTION_FAULT_ADDR register value
  * @mc_client: VM_CONTEXT1_PROTECTION_FAULT_MCCLIENT register value
+ * @pasid: debug logging only - no functional use
  *
  * Print human readable fault information (CIK).
  */