pata_arasan_cf: fix ata_host_activate() failure handling

Add missing cf_exit() and clk_put() calls to ata_host_activate()
failure path.

Cc: Viresh Kumar <[e-mail]>
Cc: Shiraz Hashim <[e-mail]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[e-mail]>
Acked-by: Viresh Kumar <[e-mail]>
Signed-off-by: Tejun Heo <[e-mail]>

drivers/ata/pata_arasan_cf.c

···
 
 	cf_card_detect(acdev, 0);
 
-	return ata_host_activate(host, acdev->irq, irq_handler, 0,
-			&arasan_cf_sht);
+	ret = ata_host_activate(host, acdev->irq, irq_handler, 0,
+				&arasan_cf_sht);
+	if (!ret)
+		return 0;
 
+	cf_exit(acdev);
 free_clk:
 	clk_put(acdev->clk);
 	return ret;