block: drbd: drbd_state: Fix some function documentation issues

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

 drivers/block/drbd/drbd_state.c:913: warning: Function parameter or member 'connection' not described in 'is_valid_soft_transition'
 drivers/block/drbd/drbd_state.c:913: warning: Excess function parameter 'device' description in 'is_valid_soft_transition'
 drivers/block/drbd/drbd_state.c:1054: warning: Function parameter or member 'warn' not described in 'sanitize_state'
 drivers/block/drbd/drbd_state.c:1054: warning: Excess function parameter 'warn_sync_abort' description in 'sanitize_state'
 drivers/block/drbd/drbd_state.c:1703: warning: Function parameter or member 'state_change' not described in 'after_state_ch'

Cc: Philipp Reisner <philipp.reisner@linbit.com>
Cc: Lars Ellenberg <lars.ellenberg@linbit.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: drbd-dev@lists.linbit.com
Cc: linux-block@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20210312105530.2219008-5-lee.jones@linaro.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/drbd/drbd_state.c

@@ -904,9 +904,9 @@ out:
  * is_valid_soft_transition() - Returns an SS_ error code if the state transition is not possible
  * This function limits state transitions that may be declined by DRBD. I.e.
  * user requests (aka soft transitions).
- * @device:	DRBD device.
- * @ns:		new state.
  * @os:		old state.
+ * @ns:		new state.
+ * @connection:  DRBD connection.
  */
 static enum drbd_state_rv
 is_valid_soft_transition(union drbd_state os, union drbd_state ns, struct drbd_connection *connection)
@@ -1044,7 +1044,7 @@ static void print_sanitize_warnings(struct drbd_device *device, enum sanitize_st
  * @device:	DRBD device.
  * @os:		old state.
  * @ns:		new state.
- * @warn_sync_abort:
+ * @warn:	placeholder for returned state warning.
  *
  * When we loose connection, we have to set the state of the peers disk (pdsk)
  * to D_UNKNOWN. This rule and many more along those lines are in this function.
@@ -1696,6 +1696,7 @@ static bool lost_contact_to_peer_data(enum drbd_disk_state os, enum drbd_disk_st
  * @os:		old state.
  * @ns:		new state.
  * @flags:	Flags
+ * @state_change: state change to broadcast
  */
 static void after_state_ch(struct drbd_device *device, union drbd_state os,
 			   union drbd_state ns, enum chg_state_flags flags,