miiphy: unify device list lookup

Rather than have every func re-implement the list walking code, do it one
local function.  This shrinks the resulting object code a little while
making the source much more manageable.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
1 file changed