staging: unisys: visornic: Remove errant -EIO returns

Remove errant -EIOs that prevent us from calling either
netif_start_queue() or napi_disable().

Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>