Bluetooth: Controller: Add missing LLCP collision resolve

When there is pending local control procedure that has instant
it should be possible to run remote control procedure without
instant because there is no collision.

There were missing code to run this case in rr_st_idle() of
refactored LLCPs.

Signed-off-by: Piotr Pryga <piotr.pryga@nordicsemi.no>