KVM: VFIO: register kvm_device_ops dynamically

KVM: VFIO: register kvm_device_ops dynamically

Now that we have a dynamic means to register kvm_device_ops, use that
for the VFIO kvm device, instead of relying on the static table.

This is achieved by a module_init call to register the ops with KVM.

Cc: Gleb Natapov <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Acked-by: Alex Williamson <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>