Drivers: hv: fcopy: rename fcopy_work -> fcopy_timeout_work

Drivers: hv: fcopy: rename fcopy_work -> fcopy_timeout_work

'fcopy_work' (and fcopy_work_func) is a misnomer as it sounds like we expect
this useful work to happen and in reality it is just an emergency escape when
timeout happens.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Alex Ng <alexng@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 1d072339fa9e32365d282d8ade32822de7d21e5f)

Orabug: 21886720
Signed-off-by: Jason Luo <zhangqing.luo@oracle.com>