tools: hv: Use hyperv.h to get the KVP definitions

Now use hyperv.h to get the KVP defines in the KVP user-mode code.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>