Bluetooth: Kconfig: Fix host phy and data length update dependency

Fix dependency on the Host to include the PHY update procedure and the
data length update procedure. In a host-only build this feature should
be possible to select without relying on the supported features of the
controller. The host will check support using HCI command to read
attached controller features and commands supported.

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>