Staging: hv: adjust Hyper-V Kconfig

Hyper-V sub-components' options should all depend on the base option.

The default of these sub-component options is also more reasonably set
to that of the base option (since it makes little sense to enable the
base option without the sub-component ones).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>