bluetooth: host: hci_core: allow both orders of version and feature events

Previously, the version complete event had to come after
the remote feature complete event for the notify_remote_info
function to be called.

This becomes less practical when adding the read all remote
features complete event, as this can take some time. Meaning
the order of events is not predictable.

Signed-off-by: Sean Madigan <sean.madigan@nordicsemi.no>