net: fman: fix 2.5G SGMII settings

The settings for 2.5G SGMII are wrong, which the 2.5G case is missed in
set_if_mode(), and the serdes PCS configuration are wrong, this patch uses
the correct settings took from Linux.

Signed-off-by: Shaohui Xie <Shaohui.Xie@nxp.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/fm/memac.c b/drivers/net/fm/memac.c
index 81a64bf..1b5779c 100644
--- a/drivers/net/fm/memac.c
+++ b/drivers/net/fm/memac.c
@@ -90,6 +90,7 @@
 		if_mode |= (IF_MODE_GMII | IF_MODE_RM);
 		break;
 	case PHY_INTERFACE_MODE_SGMII:
+	case PHY_INTERFACE_MODE_SGMII_2500:
 	case PHY_INTERFACE_MODE_QSGMII:
 		if_mode &= ~IF_MODE_MASK;
 		if_mode |= (IF_MODE_GMII);