trm290: small ->init_hwif cleanup

Core IDE PCI code takes care of assigning hwif->irq for both ports.

There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/trm290.c

@@ -277,9 +277,6 @@ static void __devinit init_hwif_trm290(ide_hwif_t *hwif)
 	if (reg & 0x10)
 		/* legacy mode */
 		hwif->irq = hwif->channel ? 15 : 14;
-	else if (!hwif->irq && hwif->mate && hwif->mate->irq)
-		/* sharing IRQ with mate */
-		hwif->irq = hwif->mate->irq;
 
 #if 1
 	{