This patch adds EthernetAVB

Based on a much lager patch by Takeshi Kihara which was
originally posted by Kuninori Morimoto.
Signed-off-by: NTakeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
[horms: extracted from a larger patch;
        corrected swapped {MATCH,CAPTURE_A} pins]
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>