scsi: blk-mq: Fix build warning when making htmldocs

Fixes the following warning when running 'make htmldocs':

  include/linux/blk-mq.h:395: warning: Function parameter or member
  'set_rq_budget_token' not described in 'blk_mq_ops'
  include/linux/blk-mq.h:395: warning: Function parameter or member
  'get_rq_budget_token' not described in 'blk_mq_ops'

[mkp: added warning messages]

Link: https://lore.kernel.org/r/20210421154526.1954174-1-ming.lei@redhat.com
Fixes: d022d18c04 ("scsi: blk-mq: Add callbacks for storing & retrieving budget token")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

include/linux/blk-mq.h

@@ -313,12 +313,12 @@ struct blk_mq_ops {
 	 */
 	void (*put_budget)(struct request_queue *, int);
 
-	/*
-	 * @set_rq_budget_toekn: store rq's budget token
+	/**
+	 * @set_rq_budget_token: store rq's budget token
 	 */
 	void (*set_rq_budget_token)(struct request *, int);
-	/*
-	 * @get_rq_budget_toekn: retrieve rq's budget token
+	/**
+	 * @get_rq_budget_token: retrieve rq's budget token
 	 */
 	int (*get_rq_budget_token)(struct request *);