move hypervisor marker into vendor bitfield

Signed-off-by: Steven Noonan <steven@uplinklabs.net>
detect HyperV hypervisor identifier

Signed-off-by: Steven Noonan <steven@uplinklabs.net>
feature.c: implement Hyper-V feature bits

Signed-off-by: Steven Noonan <steven@uplinklabs.net>
handlers: add handling of Hyper-V feature flags

Signed-off-by: Steven Noonan <steven@uplinklabs.net>