drm/radeon/radeon_cs: Fix a bunch of doc-rot issues

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

 drivers/gpu/drm/radeon/radeon_cs.c:416: warning: Function parameter or member 'backoff' not described in 'radeon_cs_parser_fini'
 drivers/gpu/drm/radeon/radeon_cs.c:735: warning: Function parameter or member 'p' not described in 'radeon_cs_packet_parse'
 drivers/gpu/drm/radeon/radeon_cs.c:735: warning: Function parameter or member 'idx' not described in 'radeon_cs_packet_parse'
 drivers/gpu/drm/radeon/radeon_cs.c:735: warning: Excess function parameter 'parser' description in 'radeon_cs_packet_parse'
 drivers/gpu/drm/radeon/radeon_cs.c:844: warning: Function parameter or member 'p' not described in 'radeon_cs_packet_next_reloc'
 drivers/gpu/drm/radeon/radeon_cs.c:844: warning: Function parameter or member 'cs_reloc' not described in 'radeon_cs_packet_next_reloc'
 drivers/gpu/drm/radeon/radeon_cs.c:844: warning: Function parameter or member 'nomm' not described in 'radeon_cs_packet_next_reloc'
 drivers/gpu/drm/radeon/radeon_cs.c:844: warning: Excess function parameter 'parser' description in 'radeon_cs_packet_next_reloc'
 drivers/gpu/drm/radeon/radeon_cs.c:844: warning: Excess function parameter 'data' description in 'radeon_cs_packet_next_reloc'
 drivers/gpu/drm/radeon/radeon_cs.c:844: warning: Excess function parameter 'offset_start' description in 'radeon_cs_packet_next_reloc'
 drivers/gpu/drm/radeon/radeon_cs.c:844: warning: Excess function parameter 'offset_mask' description in 'radeon_cs_packet_next_reloc'
 drivers/gpu/drm/radeon/radeon_cs.c:844: warning: Excess function parameter 'reloc' description in 'radeon_cs_packet_next_reloc'

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
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_cs.c

@@ -408,6 +408,7 @@ static int cmp_size_smaller_first(void *priv, struct list_head *a,
  * cs_parser_fini() - clean parser states
  * @parser:	parser structure holding parsing context.
  * @error:	error number
+ * @backoff:	indicator to backoff the reservation
  *
  * If error is set than unvalidate buffer, otherwise just free memory
  * used by parsing context.
@@ -723,8 +724,9 @@ int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 
 /**
  * radeon_cs_packet_parse() - parse cp packet and point ib index to next packet
- * @parser:	parser structure holding parsing context.
+ * @p:		parser structure holding parsing context.
  * @pkt:	where to store packet information
+ * @idx:	packet index
  *
  * Assume that chunk_ib_index is properly set. Will return -EINVAL
  * if packet is bigger than remaining ib size. or if packets is unknown.
@@ -829,11 +831,9 @@ void radeon_cs_dump_packet(struct radeon_cs_parser *p,
 
 /**
  * radeon_cs_packet_next_reloc() - parse next (should be reloc) packet
- * @parser:		parser structure holding parsing context.
- * @data:		pointer to relocation data
- * @offset_start:	starting offset
- * @offset_mask:	offset mask (to align start offset on)
- * @reloc:		reloc informations
+ * @p:			parser structure holding parsing context.
+ * @cs_reloc:		reloc informations
+ * @nomm:		no memory management for debugging
  *
  * Check if next packet is relocation packet3, do bo validation and compute
  * GPU offset using the provided start.