Merge branch 'net-phy-clean-up-phy-package-mmd-access-functions'

Heiner Kallweit says:

====================
net: phy: clean up PHY package MMD access functions

Move declarations of the functions with users to phylib.h, and remove
unused functions.
====================

Link: https://patch.msgid.link/b624fcb7-b493-461a-a0b5-9ca7e9d767bc@gmail.com


Signed-off-by: Paolo Abeni <pabeni@redhat.com>