hw/vfio/container: Get rid of qemu_open_old()

For qemu_open_old(), osdep.h said:

> Don't introduce new usage of this function, prefer the following
> qemu_open/qemu_create that take an "Error **errp".

So replace qemu_open_old() with qemu_open().

Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: "Cédric Le Goater" <clg@redhat.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/vfio/container.c

@@ -600,9 +600,8 @@ static bool vfio_connect_container(VFIOGroup *group, AddressSpace *as,
         }
     }
 
-    fd = qemu_open_old("/dev/vfio/vfio", O_RDWR);
+    fd = qemu_open("/dev/vfio/vfio", O_RDWR, errp);
     if (fd < 0) {
-        error_setg_errno(errp, errno, "failed to open /dev/vfio/vfio");
         goto put_space_exit;
     }
 
@@ -743,9 +742,8 @@ static VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp)
     group = g_malloc0(sizeof(*group));
 
     snprintf(path, sizeof(path), "/dev/vfio/%d", groupid);
-    group->fd = qemu_open_old(path, O_RDWR);
+    group->fd = qemu_open(path, O_RDWR, errp);
     if (group->fd < 0) {
-        error_setg_errno(errp, errno, "failed to open %s", path);
         goto free_group_exit;
     }