net: phy: annotate linkmode initializers as not used after init phase

Code and data used from phy_init() only, can be annotated accordingly.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/5fb9c41b-bf44-4915-a3c3-f20952fce6de@gmail.com


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