ide: remove ide_driver_t typedef

While at it:
- s/struct ide_driver_s/struct ide_driver/
- use to_ide_driver() macro in ide-proc.c

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-cd.c

@@ -1914,7 +1914,7 @@ static void ide_cd_release(struct kref *kref)
 
 static int ide_cd_probe(ide_drive_t *);
 
-static ide_driver_t ide_cdrom_driver = {
+static struct ide_driver ide_cdrom_driver = {
 	.gen_driver = {
 		.owner		= THIS_MODULE,
 		.name		= "ide-cdrom",