Drivers: hv: kvp: rename kvp_work -> kvp_timeout_work

Drivers: hv: kvp: rename kvp_work -> kvp_timeout_work

'kvp_work' (and kvp_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 68c8b39a0db71e0e76295bf277e8280ae36e7c10)

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