i3200_edac: Add a missing pci_disable_device() on the exit path

Currently, i3200_edac.c forgets to call pci_disable_device() during a
process of disabling device. This patch adds that call.

The problem was detected by Huqiu Liu.
Reported-by: NHuqiu Liu <liuhq11@mails.tsinghua.edu.cn>
Signed-off-by: NHitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
Link: http://lkml.kernel.org/r/1389587178-10167-1-git-send-email-mitake.hitoshi@gmail.comSigned-off-by: NBorislav Petkov <bp@suse.de>

drivers/edac/i3200_edac.c

@@ -464,6 +464,8 @@ static void i3200_remove_one(struct pci_dev *pdev)
 	iounmap(priv->window);
 
 	edac_mc_free(mci);
+
+	pci_disable_device(pdev);
 }
 
 static const struct pci_device_id i3200_pci_tbl[] = {