ide: remove chipset type fixup from ide_host_register()

* Set chipset type explicitly in tx4938ide and tx4939ide host drivers
  (all other host drivers were updated already).

* Remove no longer used chipset type fixup from ide_host_register().

Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
index 65cd097..4a8c5a2 100644
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -650,6 +650,7 @@
 	.pio_mask		= ATA_PIO4,
 	.mwdma_mask		= ATA_MWDMA2,
 	.udma_mask		= ATA_UDMA5,
+	.chipset		= ide_generic,
 };
 
 static int __init tx4939ide_probe(struct platform_device *pdev)