drm/amd/amdgpu/amdgpu_cs: Repair some function naming disparity

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

 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c:685: warning: expecting prototype for cs_parser_fini(). Prototype was for amdgpu_cs_parser_fini() instead
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c:1502: warning: expecting prototype for amdgpu_cs_wait_all_fence(). Prototype was for amdgpu_cs_wait_all_fences() instead
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c:1656: warning: expecting prototype for amdgpu_cs_find_bo_va(). Prototype was for amdgpu_cs_find_mapping() instead

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: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Jerome Glisse <glisse@freedesktop.org>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -672,7 +672,7 @@ static int amdgpu_cs_sync_rings(struct amdgpu_cs_parser *p)
 }
 
 /**
- * cs_parser_fini() - clean parser states
+ * amdgpu_cs_parser_fini() - clean parser states
  * @parser:	parser structure holding parsing context.
  * @error:	error number
  * @backoff:	indicator to backoff the reservation
@@ -1488,7 +1488,7 @@ int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
 }
 
 /**
- * amdgpu_cs_wait_all_fence - wait on all fences to signal
+ * amdgpu_cs_wait_all_fences - wait on all fences to signal
  *
  * @adev: amdgpu device
  * @filp: file private
@@ -1639,7 +1639,7 @@ int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
 }
 
 /**
- * amdgpu_cs_find_bo_va - find bo_va for VM address
+ * amdgpu_cs_find_mapping - find bo_va for VM address
  *
  * @parser: command submission parser context
  * @addr: VM address