block/mq-deadline: Use the new blk_opf_t type

Use the new blk_opf_t type for an argument that represents a bitwise
combination of a request operation and request flags. Rename that
argument from 'op' into 'opf'.

This patch does not change any functionality.

Cc: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20220714180729.1065367-9-bvanassche@acm.orgSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/mq-deadline.c

@@ -543,12 +543,12 @@ static struct request *dd_dispatch_request(struct blk_mq_hw_ctx *hctx)
  * Called by __blk_mq_alloc_request(). The shallow_depth value set by this
  * function is used by __blk_mq_get_tag().
  */
-static void dd_limit_depth(unsigned int op, struct blk_mq_alloc_data *data)
+static void dd_limit_depth(blk_opf_t opf, struct blk_mq_alloc_data *data)
 {
 	struct deadline_data *dd = data->q->elevator->elevator_data;
 
 	/* Do not throttle synchronous reads. */
-	if (op_is_sync(op) && !op_is_write(op))
+	if (op_is_sync(opf) && !op_is_write(opf))
 		return;
 
 	/*