pcifront: Fix an error message in device detachment

Signed-off-by: Yosuke Iwamatsu <y-iwamatsu@ab.jp.nec.com>

diff -r bfc040135633 drivers/xen/pcifront/xenbus.c
--- a/drivers/xen/pcifront/xenbus.c	Wed Mar 26 14:11:25 2008 +0000
+++ b/drivers/xen/pcifront/xenbus.c	Thu Mar 27 10:14:58 2008 +0900
@@ -332,7 +332,7 @@ static int pcifront_detach_devices(struc
 			if (err >= 0)
 				err = -EINVAL;
 			xenbus_dev_fatal(pdev->xdev, err,
-				 	 "Error reading PCI root %d", i);
+				 	 "Error reading PCI device %d", i);
 			goto out;
 		}