[BLOCK] Get rid of request_queue_t typedef

Some of the code has been gradually transitioned to using the proper
struct request_queue, but there's lots left. So do a full sweet of
the kernel and get rid of this typedef and replace its uses with
the proper type.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index da63c54..21c075d 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -654,7 +654,7 @@
 static struct scsi_cmnd *scsi_end_request(struct scsi_cmnd *cmd, int uptodate,
 					  int bytes, int requeue)
 {
-	request_queue_t *q = cmd->device->request_queue;
+	struct request_queue *q = cmd->device->request_queue;
 	struct request *req = cmd->request;
 	unsigned long flags;
 
@@ -818,7 +818,7 @@
 {
 	int result = cmd->result;
 	int this_count = cmd->request_bufflen;
-	request_queue_t *q = cmd->device->request_queue;
+	struct request_queue *q = cmd->device->request_queue;
 	struct request *req = cmd->request;
 	int clear_errors = 1;
 	struct scsi_sense_hdr sshdr;
@@ -1038,7 +1038,7 @@
 	return BLKPREP_KILL;
 }
 
-static int scsi_issue_flush_fn(request_queue_t *q, struct gendisk *disk,
+static int scsi_issue_flush_fn(struct request_queue *q, struct gendisk *disk,
 			       sector_t *error_sector)
 {
 	struct scsi_device *sdev = q->queuedata;
@@ -1340,7 +1340,7 @@
 /*
  * Kill a request for a dead device
  */
-static void scsi_kill_request(struct request *req, request_queue_t *q)
+static void scsi_kill_request(struct request *req, struct request_queue *q)
 {
 	struct scsi_cmnd *cmd = req->special;
 	struct scsi_device *sdev = cmd->device;
@@ -2119,7 +2119,7 @@
 int
 scsi_internal_device_block(struct scsi_device *sdev)
 {
-	request_queue_t *q = sdev->request_queue;
+	struct request_queue *q = sdev->request_queue;
 	unsigned long flags;
 	int err = 0;
 
@@ -2159,7 +2159,7 @@
 int
 scsi_internal_device_unblock(struct scsi_device *sdev)
 {
-	request_queue_t *q = sdev->request_queue; 
+	struct request_queue *q = sdev->request_queue; 
 	int err;
 	unsigned long flags;