Pull UML updates from Anton Ivanov:
 "I am sending this on behalf of Richard who is traveling.

  This contains the following changes for UML:

   - Fix for time travel mode

   - Disable CONFIG_CONSTRUCTORS again

   - A new command line option to have an non-raw serial line

   - Preparations to remove obsolete UML network drivers"

* tag 'for-linus-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: Fix time-travel=inf-cpu with xor/raid6
  Revert "um: Enable CONFIG_CONSTRUCTORS"
  um: Mark non-vector net transports as obsolete
  um: Add an option to make serial driver non-raw