configs: tqma6: enable DM for MDIO / PHY

Since this works with current device trees, enabled these.

Signed-off-by: Markus Niebel <Markus.Niebel@ew.tq-group.com>
diff --git a/configs/tqma6dl_mba6_mmc_defconfig b/configs/tqma6dl_mba6_mmc_defconfig
index 3f19430..a848dc8 100644
--- a/configs/tqma6dl_mba6_mmc_defconfig
+++ b/configs/tqma6dl_mba6_mmc_defconfig
@@ -51,7 +51,10 @@
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
 # CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
+CONFIG_DM_MDIO=y
+CONFIG_DM_ETH_PHY=y
 CONFIG_FEC_MXC=y
+CONFIG_RGMII=y
 CONFIG_MII=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y