[SCSI] sun3: Check for NCR_TIMEOUT being defined instead of having a value

This fixes:

drivers/scsi/sun3_NCR5380.c:1448:5: warning: "NCR_TIMEOUT" is not defined

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/sun3_NCR5380.c b/drivers/scsi/sun3_NCR5380.c
index 2ba1cb7..f3cffdf 100644
--- a/drivers/scsi/sun3_NCR5380.c
+++ b/drivers/scsi/sun3_NCR5380.c
@@ -1445,7 +1445,7 @@
     local_irq_restore(flags);
 
     /* Wait for arbitration logic to complete */
-#if NCR_TIMEOUT
+#ifdef NCR_TIMEOUT
     {
       unsigned long timeout = jiffies + 2*NCR_TIMEOUT;