ide-pmac: remove nIEN clearing from pmac_ide_do_setfeature()

Upper layers are responsible for controlling nIEN so don't clear nIEN after
command execution in pmac_ide_do_setfeature().

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ppc/pmac.c

@@ -556,7 +556,6 @@ pmac_ide_do_setfeature(ide_drive_t *drive, u8 command)
 	result = __ide_wait_stat(drive, drive->ready_stat,
 				 BUSY_STAT|DRQ_STAT|ERR_STAT,
 				 WAIT_CMD, &stat);
-	hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
 	if (result)
 		printk(KERN_ERR "%s: pmac_ide_do_setfeature disk not ready "
 			"after SET_FEATURE !\n", drive->name);