drm/amd/amdgpu/amdgpu_ib: Fix some incorrect/incomplete function documentation

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

 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c:66: warning: Function parameter or member 'adev' not described in 'amdgpu_ib_get'
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c:66: warning: Function parameter or member 'vm' not described in 'amdgpu_ib_get'
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c:66: warning: Function parameter or member 'pool_type' not described in 'amdgpu_ib_get'
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c:66: warning: Excess function parameter 'ring' description in 'amdgpu_ib_get'
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c:125: warning: Function parameter or member 'ring' not described in 'amdgpu_ib_schedule'
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c:125: warning: Function parameter or member 'job' not described in 'amdgpu_ib_schedule'
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c:125: warning: Excess function parameter 'adev' description in 'amdgpu_ib_schedule'

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: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -52,8 +52,10 @@
 /**
  * amdgpu_ib_get - request an IB (Indirect Buffer)
  *
- * @ring: ring index the IB is associated with
+ * @adev: amdgpu_device pointer
+ * @vm: amdgpu_vm pointer
  * @size: requested IB size
+ * @pool_type: IB pool type (delayed, immediate, direct)
  * @ib: IB object returned
  *
  * Request an IB (all asics).  IBs are allocated using the
@@ -101,7 +103,7 @@ void amdgpu_ib_free(struct amdgpu_device *adev, struct amdgpu_ib *ib,
 /**
  * amdgpu_ib_schedule - schedule an IB (Indirect Buffer) on the ring
  *
- * @adev: amdgpu_device pointer
+ * @ring: ring index the IB is associated with
  * @num_ibs: number of IBs to schedule
  * @ibs: IB objects to schedule
  * @f: fence created during this submission