mount: Remove a redundant call to speed things up

This way we query sysfs less times and everyone is happy.

Also update the copyright message it appear our lawyer overlords.

Change-Id: I2febde44cfc9be25b42c36ddb2e54283f7898288
Signed-off-by: Saggi Mizrahi <smizrahi@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/29679
Reviewed-by: Nir Soffer <nsoffer@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>