net: miiphybb: Update debug() print

Update the debug() print, use __func__ to always print matching
function name, and also print bus name in case there are multiple
busses.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
1 file changed