Fix IDE initialization when we don't probe for interrupts.

The driver obviously cannot rely on the interrupt handler
when it is probing for interrupts, so the identify code is
written to not use interrupts and the probing code will
disable the interrupt after having figured out which one it
is.

The non-probe code should do the same, otherwise confusion
happens. 

drivers/ide/ide-probe.c

@@ -390,6 +390,14 @@ static int try_to_identify (ide_drive_t *drive, u8 cmd)
 		cookie = probe_irq_on();
 		/* enable device irq */
 		hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
+	} else {
+		/*
+		 * Disable device irq if we don't need to
+		 * probe for it. Otherwise we'll get spurious
+		 * interrupts during the identify-phase that
+		 * the irq handler isn't expecting.
+		 */
+		hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG);
 	}
 
 	retval = actual_try_to_identify(drive, cmd);