net: phylink: Drop unused defines for SUPPORTED/ADVERTISED_INTERFACES

The defines for SUPPORTED_INTERFACES and ADVERTISED_INTERFACES both appear
to be unused. I couldn't find anything that actually references them in the
original diff that added them and it seems like they have persisted despite
using deprecated defines that aren't supposed to be used as per the
ethtool.h header that defines the bits they are composed of.

Since they are unused, and not supposed to be used anymore I am just
dropping the lines of code since they seem to just be occupying space.

Signed-off-by: Alexander Duyck <alexanderduyck@fb.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/174578398922.1580647.9720643128205980455.stgit@ahduyck-xeon-server.home.arpa


Signed-off-by: Jakub Kicinski <kuba@kernel.org>