board: gateworks: venice: enable XWAY PHY support

Enable XWAY PHY driver and remove board specific config from
board_phy_config weak override.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
diff --git a/configs/imx8mn_venice_defconfig b/configs/imx8mn_venice_defconfig
index 9a14f21..e9cb264 100644
--- a/configs/imx8mn_venice_defconfig
+++ b/configs/imx8mn_venice_defconfig
@@ -105,6 +105,7 @@
 CONFIG_FSL_USDHC=y
 CONFIG_PHYLIB=y
 CONFIG_PHY_TI_DP83867=y
+CONFIG_PHY_XWAY=y
 CONFIG_PHY_FIXED=y
 CONFIG_DM_MDIO=y
 CONFIG_DM_DSA=y