ide: add ide_retry_pc() helper

* Add ide_create_request_sense_cmd() and ide_retry_pc() helpers
  and convert ide-{atapi,floppy,tape}.c to use them.

* Remove no longer used ide*_create_request_sense_cmd(),
  ide*_retry_pc() and 'retry_pc' argument from ide_pc_intr().

* Make ide_queue_pc_head() static.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-floppy_ioctl.c

@@ -195,7 +195,7 @@ static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 	int progress_indication = 0x10000;
 
 	if (drive->atapi_flags & IDE_AFLAG_SRFP) {
-		ide_floppy_create_request_sense_cmd(&pc);
+		ide_create_request_sense_cmd(drive, &pc);
 		if (ide_queue_pc_tail(drive, floppy->disk, &pc))
 			return -EIO;