Merge branch 'netdevsim-device-and-bus'

Jakub Kicinski says:

====================
netdevsim: improve separation between device and bus

VF config falls strangely in between device and bus
responsibilities today. Because of this bus.c sticks fingers
directly into struct nsim_dev and we look at nsim_bus_dev
in many more places than necessary.

Make bus.c contain pure interface code, and move
the particulars of the logic (which touch on eswitch,
devlink reloads etc) to dev.c. Rename the functions
at the boundary of the interface to make the separation
clearer.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>