dm vdo encodings: update some stale comments

Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Matthew Sakai <msakai@redhat.com>

drivers/md/dm-vdo/encodings.c

@@ -544,8 +544,6 @@ const char *vdo_get_journal_operation_name(enum journal_operation operation)
 
 /**
  * encode_slab_depot_state_2_0() - Encode the state of a slab depot into a buffer.
- *
- * Return: UDS_SUCCESS or an error.
  */
 static void encode_slab_depot_state_2_0(u8 *buffer, size_t *offset,
 					struct slab_depot_state_2_0 state)
@@ -573,7 +571,7 @@ static void encode_slab_depot_state_2_0(u8 *buffer, size_t *offset,
 /**
  * decode_slab_depot_state_2_0() - Decode slab depot component state version 2.0 from a buffer.
  *
- * Return: UDS_SUCCESS or an error code.
+ * Return: VDO_SUCCESS or an error code.
  */
 static int decode_slab_depot_state_2_0(u8 *buffer, size_t *offset,
 				       struct slab_depot_state_2_0 *state)