Merge branch 'net-dsa-mv88e6xxx-prepare-Wait-Bit-operation'

Vivien Didelot says:

====================
net: dsa: mv88e6xxx: prepare Wait Bit operation

The Remote Management Interface has its own implementation of a Wait
Bit operation, which requires a bit number and a value to wait for.

In order to prepare the introduction of this implementation, rework the
code waiting for bits and masks in mv88e6xxx to match this signature.

This has the benefit to unify the implementation of wait routines while
removing obsolete wait and update functions and also reducing the code.
====================

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