net: orion-gbe: extend RGMII detection to delayed modes
RGMII PHY modes include delayed interface modes RGMII_ID, RGMII_TXID,
and RGMII_RXID. Also check for those modes when setup RGMII mode in
port serial ctrl register.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>