[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/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 5a4c5ea..3a2a9a3 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -945,7 +945,7 @@
  */
 static int ide_init_queue(ide_drive_t *drive)
 {
-	request_queue_t *q;
+	struct request_queue *q;
 	ide_hwif_t *hwif = HWIF(drive);
 	int max_sectors = 256;
 	int max_sg_entries = PRD_ENTRIES;