Bluetooth: hci_vhci: Fix to set the force_wakeup value

This patch sets the wakeup state of the vhci driver when the
force_wakeup is updated.

Fixes: 60edfad4

 ("Bluetooth: hci_vhci: Add force_prevent_wake entry")
Signed-off-by: Tedd Ho-Jeong An <tedd.an@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>