Bluetooth: controller: Fix mayfly caller id for thread call path

role_disable initiated through HCI commands are initiated
in thread context and controller code was using the job
mayfly caller id instead of using the correct app caller
id.

Also the XTAL retain calls being called from two different
call context used the same worker caller id and same mayfly
instead of using the correct caller ids and independent
mayfly for each caller.

This potentially could cause mayfly enqueued list to be
corrupted and enqueued mayfly could be lost.

Change-id: Ia356419462d1fb4e38f4a20c720974143f12fdb6
Signed-off-by: Vinayak Chettimada <vinayak.kariappa.chettimada@nordicsemi.no>