ide: mark "hdx=[driver_name]" and "hdx=scsi" kernel parameters as obsoleted

Mark "hdx=[driver_name]" and "hdx=scsi" kernel parameters as obsoleted
(nowadays device-driver binding can be changed at runtime through sysfs
 and it can also be dealt with using per device driver parameters).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Documentation/ide/ide.txt

@@ -242,10 +242,6 @@ Summary of ide driver parameters for kernel command line
 
  "hdx=nodma"		: disallow DMA
 
- "hdx=scsi"		: the return of the ide-scsi flag, this is useful for
- 			  allowing ide-floppy, ide-tape, and ide-cdrom|writers
- 			  to use ide-scsi emulation on a device specific option.
-
  "idebus=xx"		: inform IDE driver of VESA/PCI bus speed in MHz,
 			  where "xx" is between 20 and 66 inclusive,
 			  used when tuning chipset PIO modes.

drivers/ide/ide.c

@@ -1258,7 +1258,7 @@ static int __init ide_setup(char *s)
 		drive = &hwif->drives[unit];
 		if (strncmp(s + 4, "ide-", 4) == 0) {
 			strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
-			goto done;
+			goto obsolete_option;
 		}
 		switch (match_parm(&s[3], hd_words, vals, 3)) {
 			case -1: /* "none" */
@@ -1296,7 +1296,7 @@ static int __init ide_setup(char *s)
 				goto done;
 			case -14: /* "scsi" */
 				drive->scsi = 1;
-				goto done;
+				goto obsolete_option;
 			case 3: /* cyl,head,sect */
 				drive->media	= ide_disk;
 				drive->ready_stat = READY_STAT;