fsl-mc: Update dependencies for DM_ETH

When using DM_ETH, which should be the default now, we need to always
have DM_MDIO and FSL_LS_MDIO enabled, so select them.

Cc: Priyanka Jain <priyanka.jain@nxp.com>
Cc: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Cc: Wasim Khan <wasim.khan@nxp.com>
Cc: Udit Agarwal <udit.agarwal@nxp.com>
Cc: Ashish Kumar <Ashish.Kumar@nxp.com>
Cc: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Cc: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Manish Tomar <Manish.Tomar@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/net/fsl-mc/Kconfig b/drivers/net/fsl-mc/Kconfig
index ae4c357..8fc34dc 100644
--- a/drivers/net/fsl-mc/Kconfig
+++ b/drivers/net/fsl-mc/Kconfig
@@ -6,6 +6,8 @@
 	bool "NXP Management Complex"
 	depends on ARCH_LS2080A || ARCH_LS1088A || ARCH_LX2160A || ARCH_LX2162A
 	default y
+	select DM_MDIO
+	select FSL_LS_MDIO
 	select RESV_RAM
 	help
 	  Enable Management Complex (MC) network